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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 149514: How do I solve the following system of linear equation
4x - 3y = 9
2x + y = 12

Click here to see answer by tryin2bhelpful(6)

Question 149513: how do I solve the following system of linear equation
4x +2y = 4
Y = 2 - 2x
Click here to see answer by jim_thompson5910(28705)

Question 149678: If a certain number is 3 more than 7 times itself, what is the number?
Click here to see answer by Alan3354(31515)

Question 149688: How do I solve 5x+4=7 and x-3y=9. I have to find the graph
Click here to see answer by ankor@dixie-net.com(15746)

Question 149689: How do I solve 5x+4=7 and x-3y=9. I have to find the graph
Click here to see answer by Alan3354(31515)

Question 150307: y=18x+10 & 2y=18x+10
Click here to see answer by mangopeeler07(462)

Question 150403: 9. 2x - 4y - 14 = 0
15. y = -x -15
I don't understand how to do Linear's can u please tell me step- by- step.
Click here to see answer by jim_thompson5910(28705)

Question 150403: 9. 2x - 4y - 14 = 0
15. y = -x -15
I don't understand how to do Linear's can u please tell me step- by- step.
Click here to see answer by stanbon(57962)

Question 150457: Solve for k
8asquared bcubed
over
3k
equals 4a
Click here to see answer by jim_thompson5910(28705)

Question 150713: if the line containing points (-8,m) and (2,1) is parallel to the line containing points (11,-1) and (7,m+1), what must be the value of m?
Click here to see answer by vleith(2825)

Question 150730: 4x+3y =-28
5x-6y =-35

please solve using elimination method
Click here to see answer by Fombitz(13828)

Question 150729: 5x-2y=-16
2x+ y= 8
please solve using elimination method
Click here to see answer by Electrified_Levi(103)

Question 150807: Please help with this problem.
Z=sqrt((1000^2)+(1592^2))
It is my understanding that the square root of a "number" squared is the "number".
If this is true I would solve this as: Z=1000+1592 so Z=2592, but Im not sure this is correct
Click here to see answer by jim_thompson5910(28705)

Question 150985: This is a summer Assignment. I don't have a book.
"Write the equation of the line perpendicular to the line y=1/2x + 2 that passes through the point (-4,5)."
Click here to see answer by jim_thompson5910(28705)

Question 151144: Is it safe to assume that linear equations do not have a domain? Why or why not?

Click here to see answer by mducky2(62)

Question 151163: Could you please help me solve this system of equations?
5x+3y+z=-13
x-3y+2z=1
14x-2y+3z=-16
Click here to see answer by nabla(475)

Question 151183: calculate:
x - 3x=2

Click here to see answer by vleith(2825)

Question 151256: can anyone help me find the answer.it is about application of linear system.the question is like this,a salesperson is offered two salary plans.the first gives a basic salary RM 1000 a month and a 5% comission on all sales,while the second plan gives basic salary of RM 1500 a month and a 4% comission.so if x is the amount of sales y and y the monthly salary,how much sales are required so that each plan yields the same total salary?
Click here to see answer by joLeeBee(6)

Question 151236: how do you solve with slope intercept form and standard form 5y=4x-2 (5, -1)
Click here to see answer by joLeeBee(6)

Question 151298: Could you please help me solve the system of equations?
3x+3y+z=5
x-3y+2z=-13
8x-2y+3z=-8
Click here to see answer by jim_thompson5910(28705)

Question 151320: Hello may someone please elp me with this question im very confused!
The length of a rectangle is 3 in. more than the width. The perimeter of the rectangle is 24 in.
I THINK THAT I AHVE FOUND THE VARIABLES LENGTH=3iN. WIDTH=24iN.(AM I RIGHT???)

What is the expression for the length in terms of the width?
What is the length of the rectangle?
Click here to see answer by stanbon(57962)

Question 151342: Could you help me solve for the ordered pairs?
y=5^(3x+1)
y=25^(-x)
Click here to see answer by scott8148(6628)

Question 151387: Could you please help me solve this system of equations? When I attempted to solve it I came out with (0,1,-5). This does not seem correct.
5x+3y+z=0
x-3y+2z=9
14x-2y+3z=11
Click here to see answer by oscargut(900)

Question 151438: Could you please help me solve this equation for A, B, and C.
11x^2-x+8/(x+1)(X^2+4)=A/(x+1)+Bx+C/X^2+4
Click here to see answer by jim_thompson5910(28705)

Question 151581: Could you please help me solve this equation for the ordered pair? I can come up with the first part of the answer, but he second part of the pair I can't get.
y=2^(5x+1)
y=4^(-x)
Click here to see answer by vleith(2825)

Question 151590: Jessie is four years older than Lea. Eight years ago, he was twice as old as Lea. Find their present ages. Solve using two variables.
Click here to see answer by nerdybill(7003)

Question 150728: I need to form the following equations and plot the graph of these equations
linear equation with one variable
Linear equation wit two variables.
Click here to see answer by mangopeeler07(462)

Question 151677: solve for x
(x-5)/3 - 3/3 = (4x + 7)/6
Click here to see answer by jim_thompson5910(28705)

Question 151992: How can you determine if two lines of perpendicular?
Click here to see answer by Earlsdon(6294)

Question 152079: I need help with this one question i have been stuck on for a few days now here it is.
A process of elimination.
6x+2/3y= 9
2x+2/3y= 7
i dont have a text book number because it is in a module book
Click here to see answer by Earlsdon(6294)

Question 152081: Help with this one too?
This linear systems by substitution, i think this is a no solution problem though , i have tried everything and i can not get it . I have literally been on this question for 3 months now.....
i may just have a big brain fart or something but here it is.
3x+5y=12
x+3y=6
Click here to see answer by scott8148(6628)

Question 152170: a grocer needs to mix raisins at $2.00 per lbs with granola @ $3.25 per lbs to obtain 10 lbs of mixture that cost $2.50 per lb. how many pounds of each must be used?
Click here to see answer by nerdybill(7003)

Question 152168: how much cream and milk to the nearest thousandth of a gallon must be mixed together to obtain 50 gallons of cream that contains 12.5% butterfat
facts:
how many gallons of cream containing 25% butterfat and milk containing 3.5% butter fat must be mixed to obtain 50 gall of cream containing 12.5% butterfat?
Click here to see answer by ankor@dixie-net.com(15746)

Question 152172: solve the system:
x+y=4
x+z=4
y+z=4
Click here to see answer by mducky2(62)

Question 152235: HOW WOULD I SOLVE THIS algebracially ?

3/4x-2/5y=2
1/2x-3/5y=-2
Click here to see answer by jim_thompson5910(28705)

Question 152167: System of Linear Equations:
Solve the system using the addition method.
5x=6y+40
2y=8-3x
Click here to see answer by checkley77(12569)

Question 152381: hello. I am having difficulties with my summer math packet, I am really stuck on the problems that have to do with slope, one of these problems is to determine the slope of the line that passes through (5, 1) and (2, 7) so far, I have determined that it may be 6/-3, I used the y2-y1/x2-x1 formula, but I still sense it may be wrong. . I have even more difficulty when I have to use fractions with it such as (-1/2, -2) and (-3/2, 1), I have completely forgotten everything, and desperatly need help
Click here to see answer by Earlsdon(6294)

Question 152483: Your organization is planning a conference with 193 people in attendance that need transportation. There are 8 drivers available and 2 types of vehicles, buses and SUV’s . The bus seats 51 people each. The SUV seats 8 people each. How many buses and SUVs will be needed?
Let b= # of buses
Let s= SUVs
Drivers s+b =8
People 51b + 8b = 193

Click here to see answer by vleith(2825)

Question 152479: Systems of equations can be solved by graphing or by using substitution or elimination. What are the pros and cons of each method?
Click here to see answer by Fombitz(13828)

Question 152476: Solve by elimination: 5x -6y = -32
3x+6y= 48

Click here to see answer by oscargut(900)

Question 152569: How many solutions are in the equation: (-2x+y=1, -4x+2y=-8)
Click here to see answer by jim_thompson5910(28705)

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, 10846..10890