Questions on Algebra: Systems of Linear Equations answered by real tutors!

Tutors Answer Your Questions about Linear-systems (FREE)

Question 34248: 5x-2y=-5
y-5x=3
solve by substitution
Click here to see answer by checkley71(8403)

Question 34580: please help me solve this.. i don't even know where to begin. :(

Click here to see answer by Earlsdon(6287)

Question 34580: please help me solve this.. i don't even know where to begin. :(

Click here to see answer by MrTillman(3)

Question 34610: someone please help :(

Click here to see answer by priya(51)

Question 34624: Solve the system by the substition method.

x-6=y
y+4=x
Click here to see answer by checkley71(8403)

Question 34635: Solve the system by the substitution method.
4x+y=16
16x+4y=64
Click here to see answer by askmemath(368)

Question 34581: please help :)

Click here to see answer by rahman(247)

Question 34726: Solve the system of equations by the addition method.

x-4y=-18
-6-4y=64
Click here to see answer by longjonsilver(2297)

Question 34726: Solve the system of equations by the addition method.

x-4y=-18
-6-4y=64
Click here to see answer by Prithwis(166)

Question 34727: Solve the system of equations by the addition method..All I have.

x-4y=-18
-6x+4y=-36
Click here to see answer by hydromojo(20)

Question 34727: Solve the system of equations by the addition method..All I have.

x-4y=-18
-6x+4y=-36
Click here to see answer by ichudov(499)

Question 34765: sOLVE THE SYSTEM OF EQUATIONS BY THE ADDITION METHOD

x-7y=-42
3x-6y=-36
Click here to see answer by checkley71(8403)

Question 34860: y=-x+3 y=x+1
Click here to see answer by lyra(94)

Question 35180: Ok this is what I think the following question is asking
So the question reads:
a company produces three different products: basic, mid-range, and superior.
• For each basic item, the company spends, on the average, $50 for the components, $20 for assembly, and $30 for packaging and dispatch.
• For a mid-range item, the spending is $100 for the components, $40 for assembly and $80 for packaging and dispatch.
• For the deluxe model, they spend $200 on components, $120 for assembly and $240 for packaging and dispatch.
If the budget allows $2,350,000 for components, $1,100,000 for assembly, and $2,050,000 for packaging and dispatch, set up and solve a system of linear equations to determine how many items of each kind can be produced.
So is what I have below on the right track or have I totally got it wrong? And what has to be done to solve it???
And the lines are supposed to be in line
.....................|Basic | Mid | Superior | Budget
Components..| 50 | 100 | 200 | 2,350,000
Assembly......| 20 | 40 | 120 | 1,100,000
Pack & disp..| 30 | 80 | 240 | 2,050,000

Click here to see answer by stanbon(57395)

Question 35309: help!!! solve the system by addition -4x+7y=-10
x-5y=9
Click here to see answer by checkley71(8403)

Question 35788: use substition method
x-4y=1
3x-5y=-4
Click here to see answer by Nate(3500)

Question 35877: college students spend $183 more each year on textbooks and course materials than on ccomputer equipment. They spend a total of $819 on textbooks and course materials and computer equpment each year. How much is spent each year on text books and course materials and how much is spent on computer equipment?
Click here to see answer by checkley71(8403)

Question 36902: Write a linear equation in two variables that is satisfied by (-3, 5). Are the equations independent or dependant?
Click here to see answer by venugopalramana(3286)

Question 37061: Solve by substitution -
5x - 2y = -5
y - 5x = 3
Click here to see answer by jcmtnez(53)

Question 37063: Solve by substitution -
4x - 12y = 5
-x + 3y = -1
Click here to see answer by checkley71(8403)

Question 37062: Solve by substitution -
8x - 4y = 16
y = 2x - 4

Click here to see answer by jcmtnez(53)

Question 37058: Find values for m and b in the following system so that the solution to the system is (-3, 4)
5x + 7y = b
mx + y = 22
Click here to see answer by jcmtnez(53)

Question 37159: Solve by using either addition or substitution. If a unique solution does not exist, state whether the system is dependent or inconsistent.

10x + 2y = 7
Y = -5x + 3
Click here to see answer by fractalier(2101)

Question 37149: Solve by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent.
2x + 3y = 1
5x + 3y = 16
Click here to see answer by checkley71(8403)

Question 37158: Solve each of the following systems by substitution.
8x – 4y = 16
Y = 2x – 4
Click here to see answer by fractalier(2101)

Question 37221: how can you interpret the solution of a system of equations by the corresponding graph?

Click here to see answer by jcmtnez(53)

Question 37347: Eve has two more marbles than Solene. Solene has twice as many marbles as Steve. Steve has 7 less marbles than Eve. How many marbles do they have between them?

Click here to see answer by AnlytcPhil(1278)

Question 37636: 15-7x=8x-30
Click here to see answer by jessicaherndon(6)

Question 37638: -5(d+3)=7d+5 and 2/5(a+10)=1/4(a+20), these should help me with the rest of the problems. I am doing the problems so that I can check his work. Thanks.
Click here to see answer by josmiceli(9697)

Question 37694: Determine the intercepts for the linear rule, 4y - 7x= 28
Click here to see answer by checkley71(8403)

Question 37842: I would please like your help with this problem: 5x-3(2x-1)=5-3(-x+2)
Click here to see answer by fractalier(2101)

Question 37780: please help me solve this equation -(2x+9)-(6x-2)=7-(2x-10)
Click here to see answer by fractalier(2101)

Question 37911: This is a toughie, Can you help?
Water pressure (p) in the ocean is 2.3 tons per square inch at a depth (d) of 2 miles and 3.45 tons per square inch at a depth of 3 miles. How do you find the pressure at a depth of 4 miles?
I think you have to write a linear equation; this is what I did when I tried. Please help!
Click here to see answer by checkley71(8403)

Question 38001: Your teacher is giving you a test worth 100 points containing 40 questions. There are two-point and four-point questions on the test. How mamy of each type of question are on the test? please help me to sovle it. thank you.

Click here to see answer by checkley71(8403)

Question 38003: Please help me solve this problem.
The basal energy requirement B is the number of calories that a person needs to maintain the life process. For a 28-year old female with a height of 160 centimeters and a weight of 45 kilograms (kg), B is 1300 calories. If her weight increases to 50kg, then B is 1365 calories. There is a linear equation that expresses B in terms of her weight w. Find the equation and find the basal energy requirements if her weight is 53.2kg.
Click here to see answer by fractalier(2101)

Question 37938: What is the slope of the line with equation 4x+6y=24?
Click here to see answer by fractalier(2101)

Question 38006: Please help me solve this problem.
The basal energy requirement B is the number of calories that a person needs to maintain the life process. For a 28-year old female with a height of 160 centimeters and a weight of 45 kilograms (kg), B is 1300 calories. If her weight increases to 50kg, then B is 1365 calories. There is a linear equation that expresses B in terms of her weight w. Find the equation and find the basal energy requirements if her weight is 53.2kg.
Click here to see answer by fractalier(2101)

Question 38453: i dont get how to do this at all. i learned once, but ive forgotten & i forgot to bring home my book. the problem is what is the solution of the following system of linear equations?
y = 2x
4x - y = 10
can you please explain to me how to do this, so i can do it and the rest of them? :]
Click here to see answer by stanbon(57395)

Question 39063: |x|=10

Click here to see answer by simplice(1)

Question 38784: x/2 + y/4 = 1/7
x/4 + y/6 = 1/4
solve for x and y
I got x = 29/49 if this is correct please help me determine y.
thank you.
Click here to see answer by fractalier(2101)

Question 39334: solve for x and y in the following problem
18 x +y = 26, 6x -3y = 24
Click here to see answer by checkley71(8403)

Question 39330: Solve for x,y in the following system of three
x + 10y + z = 52
5x + y + 4z =15
x + 2y - 3z = 12
Click here to see answer by venugopalramana(3286)

Question 39414: Tell wether the systems of equations have only one ordered paias a solution or not. Also explain your answer by telling wether the graphs of the equations are parallel lines, intersecting lines, or the same lines.
2 x - y = 10
x + y = -1
Click here to see answer by fractalier(2101)

Question 39476: could you please help me with this problem .1x+2.3=.7x+.5
Click here to see answer by Nate(3500)

Question 39476: could you please help me with this problem .1x+2.3=.7x+.5
Click here to see answer by checkley71(8403)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845