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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 601822: If 3x + 2y = 22 then 9x + 6y = ____?

Click here to see answer by flame8855(424)

Question 601895: Solve to find x. 2x+y=3 and -7x+2y=17.
Click here to see answer by lawdej(58)

Question 602059: Use the elimination method to solve the system of equations
a+7b=15
a+4b+6
Click here to see answer by Alan3354(30993)

Question 602327: detrmine the value of the relation when x=0, when x=1 and when x=2
Click here to see answer by Alan3354(30993)

Question 602393: solve by using graphical method
y= 5/7x - 2
y= 1/3x + 2/3
I can not figure out how to come up with the 4 plots in order to graph, the fractions throw me off.
Click here to see answer by ewatrrr(10682)

Question 602859: please help me solve this: (5x^4y)(-1/5xy^3)(2xy^2)
Click here to see answer by flame8855(424)

Question 602995: Hello my name is Shamaila and I have problem solving these problems. 1. 5x-3y=1 y=3x-7
2. x=2y-10 4x-y=-47 3. 6x+5y=7 3x-7y=13 4. x-y=3 2x=4+2y 5. y=3x-2 y=2x-9 6. -2x+y=7 4x=2y-14
I will really really appreciate if anyone helps me solve these problems i dont know how to do them. Thank you so much!
My email address is bklynzkuri420@yahoo.com I need it by tonight thank you!
Click here to see answer by ankor@dixie-net.com(15647)

Question 603243: 2x-3y__=4
__-3y+z=2
x____-z= -5
How do you solve??? Please Hurry('X
Click here to see answer by lynnlo(4155)

Question 603551: Determine the best method to solve each system of equations. Then solve the system.
y=2x
x+2y=8
Click here to see answer by Alan3354(30993)

Question 603757: 8x+5y-3x-4y
Click here to see answer by alicealc(281)

Question 603765: Can you please sovle me this equation 2y+3x=1050
Y+x=450
Click here to see answer by mananth(12270)

Question 603886: Can you help me solve the equations ax + by = m and cx + dy = n. somehow the answer is supposed to be those two equations combined into one.
I need an answer asap
everything I have done is wrong and I need to know how to figure them out.

Click here to see answer by Alan3354(30993)

Question 603907: Can you solve the equation 4x-5y=3, x=1/2y-3
Click here to see answer by richwmiller(9135)

Question 603990: Trying to help my 7th grade son with math homework. The problem is: Write an equation with variables on both sides that has a solution of -1 (negative one). Thank You for any assistance!
Sarah
Click here to see answer by scott8148(6628)

Question 604016: 28xy-20x-49y+35
Click here to see answer by Alan3354(30993)

Question 604190: Find an equation of the line that passes through (6,6) and (-6,-6). Write the answer in slope-intercept form, using x as the independent variable.
Click here to see answer by alicealc(281)

Question 604196: Write each expression using positive exponents only:
h -10/8a -9

Click here to see answer by vleith(2825)

Question 604199: Write the number in scientific notation.
0.000073 x 10^-2
Click here to see answer by mananth(12270)

Question 604192: Simplify :(-5)-2
Click here to see answer by flame8855(424)

Question 604178: -4^-1+4^-2
Click here to see answer by flame8855(424)

Question 604432: solve by elimination method
x+y=8
-x+6y=6
Click here to see answer by lynnlo(4155)

Question 604421: Fatuma recently hired a plumber to do some necessary work. On the final bill, Fatuma was charged a total of $990. $340 was listed for parts and the rest for labor. If the hourly rate for labor was $65, how many hours of labor was needed to complete the job?
(A) First write an equation you can use to answer this question. Use x as your variable.

Click here to see answer by rosey51235(25)

Question 604333: Use scientific notation to perform the calculations. Give the answer in scientific notation and standard notation.
7.2x10^2 / 1.2x10^4
Click here to see answer by josmiceli(9669)

Question 604408: I am working on systems of Linear Equations, solving using the addition method
If it is inconsistent we are to state such, if it is dependent we indicate, x, and answer.
I know this should be simple, I cannot get the hang of it, I tried to follow the book, to no avail.

{ x-7 + y + 9 = 5
--- ----
5 2

x+9 + y-7 = 6
___ ___
2 3
2(x-7) + 5(y+9) = 50
3(x+9) + 2(y-7) = 36
2x + 5y = 19
3x + 2y = 23
5x + 7y = 42
x = 7y + 42 / 5

I really dont know what I am doing or what I should do at this point. I would deeply appreciate assistance. Thank you!

Click here to see answer by mananth(12270)

Question 604420: 8x+5y=-37
6x-5y=-89
Click here to see answer by alicealc(281)

Question 604500: through:(1,2), slope=7
Click here to see answer by alicealc(281)

Question 604612: Determine whether the given pair is a solution of equations. Remember to use alphabetical ordered variables.
(1,9) 7x-y=-2
3x-7y=-60
Click here to see answer by jim_thompson5910(28549)

Question 604614: Solve by the elimination method.

4x-y=25
x+y=15
Click here to see answer by jim_thompson5910(28549)

Question 604606: Solve using the substitution method
3x+5y=19
X=33-7y
Having a hard time grasping the substitution method. Thanks!
Click here to see answer by Alan3354(30993)

Question 604656: what would be the x and y intercepts for the equation 2y=x
Click here to see answer by Alan3354(30993)

Question 604655: what would be the x and y intercepts for the equation x=2y
Click here to see answer by Alan3354(30993)

Question 604609: Solve the system using the substitution method
0.1x+0.3y=1.6
0.8x-0.7y=5.8
Click here to see answer by lwsshak3(6490)

Question 604666: how would i solve the equation x=2y using graphing?
this is the question i meant to ask
Click here to see answer by Alan3354(30993)

Question 604719: Question:
Solve the equations from question 4 to show that the coordinates found in question 3 are the solution of these equations.
Coordinates in question 3: (3,1)
Question 4 equations: AB y= 3/4 -3 CD y=-3 + 10
Many thanks
Click here to see answer by stanbon(57290)

Question 604800: ] Find all values of a for which the following linear system:

a) has no solution, b) has a unique solution, c) has infinitely many solutions.
Solve the linear system for a = 7.

Click here to see answer by Alan3354(30993)

Question 604899: How do I solve systems of equations by substitution for example
x + y =
x - y =
Click here to see answer by AnlytcPhil(1276)

Question 604931: Having trouble please help. solve using elimination method. 3x+4y=-8, 7x-4y=-32
Click here to see answer by scott8148(6628)

Question 604959: My assignment is solve a sytem of equations by using an augmented matrix and elementry row operations: Here are the 3 problems I am having trouble with.
1. y = 2x + 3
y = 4x - 1
2. 8x + 2y = 13
4x + y = 11
3. -x + 1/3y = 5
2x + 3y = 1
Click here to see answer by lynnlo(4155)

Question 605011: The current I in an electrical conductor vary inversely as the resistance R of the conductor. The current is 5 amperes while the resistance is 950 ohms. What is the current when the resistance is 510 ohms?
Click here to see answer by Alan3354(30993)

Question 605100: Choose the equation of teh line that passes through the point (-4,-8) and has a slope of zero.
Click here to see answer by stanbon(57290)

Question 605056: Find the ordered pair which solves this system of equations: 2x-3y=11 and 4x+y=15
Click here to see answer by mananth(12270)

Question 605111: Solve the following system of equations for x:
6x+7y=-8
-6x-14y=22
I need your help please. I can't figure out if there is an answer or if these equations represent parallel lines and there is no solution or if these equations represent the same line and there are infinite solutions.
Thank you so much for your help!!
Click here to see answer by ankor@dixie-net.com(15647)

Question 605118: Choose the number solutions to the following system of equations:
x-3y=3
-5x+15y=-15
This one confuses me. Is there one solution, no solutions, many solutions or cannot be determined? Thanks for any help you can give me.
Click here to see answer by richard1234(5390)

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