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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 410102: Solve the systems of equations by the substitution method:
y=9x+7
3x-2y=1
Thanks,
Vanessa
Click here to see answer by ankor@dixie-net.com(15656)

Question 410578: Find the missing values that solve this equation.
2x+y = 6

Click here to see answer by Alan3354(30993)

Question 410600: solve
-3
Click here to see answer by Alan3354(30993)

Question 410160: tell whether the y=x-1, y=-3x-5 has one solution, many solutions, or no solution
Click here to see answer by richard1234(5390)

Question 410820: Solve by substitution.
7x-6y=-80
5x+67=y
What is the solution?
Type an ordered pair.
Click here to see answer by angelagallegos(8)

Question 411059: Solve this system of equations using substitution. Put your answer in ordered pair form, (x, y).
2x + 5y = 2
-3x - y = -3
Solve this system of equations using substitution. Put your answer in ordered pair form, (x, y).
8x - y = 31
5x + 3y = 23
Solve this system of equations using substitution. Put your answer in ordered pair form, (x, y).
2x + 6y = 24
5x - 2y = 9

Click here to see answer by MathLover1(6634)

Question 411123: Can this problem be done by elimination are subsitution
if so can you show me which one and how to do it?
y+4x=-5
y+5x=3
Click here to see answer by rfer(12662)

Question 411123: Can this problem be done by elimination are subsitution
if so can you show me which one and how to do it?
y+4x=-5
y+5x=3
Click here to see answer by ewatrrr(10682)

Question 411131: Solve by substitution method.
8x+5y=29
-8x+y=25
Click here to see answer by robertb(4012)

Question 410974: Bayside insurance offers two health plans. Under plan A, Giselle would have to pay the first $60 of her medical bills, plus 25% of the rest. Under plan B, Giselle would pay the first $210, but only 20% of the rest. For what amount of medical bills will plan B save Giselle money? Assume she has over $210 in bills.
Click here to see answer by ankor@dixie-net.com(15656)

Question 411252: what solution set will satisfy if the system of equation 4x+y=8 a2x=3y+11 are manipulated using substitution?

Click here to see answer by ewatrrr(10682)

Question 411312: 1.separate 46 into two parts so that one part is more than twice as much as the first part. find each part.
Click here to see answer by ewatrrr(10682)

Question 411517: I am trying to solve a set of equations by the elimination method, but I am having trouble. The set of equations I have to solve are 4x-5y=38 and 7x-8y=22.
Can someone please help?
Click here to see answer by nerdybill(6961)

Question 411528: what solution set will satisfy if the system of equation 4x+y=8 and 2x=3y+11 are manipulated using substitution?

Click here to see answer by rfadrogane(214)

Question 412009: i have to write my own linear system problem for school and solve it by using elimination and substitution but when i tried solving it i got two different solutions
the equations are y=1500+20x and y=3000+10x
when i used substitution i got (150,4500)and with elimination i got (-300,-4500)
is that correct or wrong?
Click here to see answer by nerdybill(6961)

Question 412025: I am not understanding how to Solve the system of linear equation using matrices.
x+y=3
4y=12
7x+3y-4z=5
Can you guide me step by step in solving it?
Click here to see answer by ewatrrr(10682)

Question 412030: Solve using the multiplication principle first. Then add. Then show your check for both equations.
-x-y=8 equation (1)
2x-y=-1 equation (2)
I think I have the correct answers. x=-3 and y=-5. My problem is my check on the first equation -x-y=8. I cannot get it to check. The second equation checks. 2x-y=-1: 2*3-(-5)=-1. Can you show me how to check -x-y=8 please. I have spent an hour trying to get this to check and it won't. This algebra area we are doing is System of equations the elimination method and we have to do the multiplication principle first, then add, then do our checks for each equation. I have to turn this in first thing in the morning and I am frustrated at this point because I cannot make the first problem check. Please help.
Click here to see answer by solver91311(16897)

Question 412065: Solve the system of linear equation using matrices
x+y=1
x-7y=17

I wanted to double chek it but i got (3,-2) is it right? if not please correct me.
Click here to see answer by Alan3354(30993)

Question 412068: Solve the system of linear equation using matrices
x+6y=7
x+5y=5
I wanted to double chek it but i got (5,-2) is it right? if not please correct me.

Click here to see answer by sudhanshu_kmr(1152)

Question 412052: I am not understanding how to Solve the system of linear equation using matrices
x+y+z=3
2x -z=7
5y+z=4
Can you guide me step by step in solving it?
Click here to see answer by ewatrrr(10682)

Question 412059: I am not understanding how to Solve the system of linear equation using matrices
4x-y+2z=5
2y+z=4
4x+y+3z=10
Can you guide me step by step in solving it?

Click here to see answer by Edwin McCravy(8909)

Question 412278: I need help on solving systems by elimination:
Example of a problem:
x - y = -3
5x + 3y = 1
Click here to see answer by shree840(260)

Question 412278: I need help on solving systems by elimination:
Example of a problem:
x - y = -3
5x + 3y = 1
Click here to see answer by stanbon(57361)

Question 412308: 9x+2y=9

Click here to see answer by mananth(12270)

Question 412383: WORK
3)Two executives in cities 400 miles apart drive to a business meeting at a location on the line between their cities. They meet after 4 hrs. Find the speed of each car if one car travels 20 miles per hour faster than the other does.

Thank you in advance! Hoping for your immediate reply.
Click here to see answer by sudhanshu_kmr(1152)

Question 412382: MONEY AND INVESTMENT
4) Maria has twice as much money invested at 5% simple annual interest as she does at 4%. If her yearly income from these two investments is Php 350, how much does she have invested at each rate?

Thank you in advance! Hoping for your immediate reply.
Click here to see answer by Theo(3464)

Question 412385: A merchant wishes to mix coffee worth Php 18.00 per kilo with coffee worth Php 9.00 per kilo to get 90 kilos of mixture worth Php 12.00 per kilo. How many kilos of the Php 18.00 and 19.00 coffee will be needed?
Click here to see answer by Theo(3464)

Question 412406: The sum of x and y numbers is 20. The difference of the two numbers is 16. If the numbers are x and y, which system of linear equations represents the problem?
Click here to see answer by ewatrrr(10682)

Question 412384: A 90% antifreeze solution is to be mixed with a 75% solution to get 120 liters of a 78% solution. How many liters of the 90% and 75% solutions will be used?

Thank you in advance! Hoping for your immediate reply.
Click here to see answer by stanbon(57361)

Question 412434: Decide whether (-4,2) is a solution of the system.
3x+2y=-8
2x-y=-6
Click here to see answer by ewatrrr(10682)

Question 412461: Please convert the following equation to standard form
y + 4 = 3(x - 5)
Click here to see answer by ewatrrr(10682)

Question 412461: Please convert the following equation to standard form
y + 4 = 3(x - 5)
Click here to see answer by MathLover1(6634)

Question 412521: reducir los terminos semjontes diversas clascis
reduce the terms that are similar various classical
i am living in ecuador with minimal spanish..... above are my directions for the following problem.
3x-2y+4x-5z-x+3y-3z+5y=
savannah
Click here to see answer by Alan3354(30993)

Question 412685: solving for x
4x-3=21
Click here to see answer by Alan3354(30993)

Question 412642: -4x+3y=-12
-2x+3y=-18
how do you slove and graph this
Click here to see answer by rfer(12662)

Question 412776: What is the y-intercept of - 9x + y =33 ?

Click here to see answer by edjones(7569)

Question 412776: What is the y-intercept of - 9x + y =33 ?

Click here to see answer by algebrahouse.com(1079)

Question 412775: solve the linear system using elimination:
x+y=5
X-y=3
Click here to see answer by solver91311(16897)

Question 412824: Please show me how to graph the following parallel lines
6X +5Y = 2 and 3X + 2.5Y = -7 and how you came to this conclusion.
Click here to see answer by shree840(260)

Question 412861: What are the steps to solve a system?
Here's the example:
x-2y=-7
5y=5x+20
I Have tried canceling out the -2y and 5y or 5x and x but I didn't get the answer right.
I Need the answer and steps so i know how to do this problem on my own when i have a test.
Please :)
Click here to see answer by stanbon(57361)

Question 412924:
Kindly answer these problems please because i am still quite confused in answering these problem using system of linear equations.
3) Working together, James and Chris painted their gate in 3 hrs. and 20 min. Working alone, Chris woul need 5 hrs. longer than James to finish the job. How long would it take each of them alone to do the job?
Thank you in advance! Hoping for your immediate reply.

Click here to see answer by mananth(12270)

Question 412923: Kindly answer these problems please because i am still quite confused in answering these problem using system of linear equations.
2) A diving pool can be filled by a pipe in 10 hrs. if the drain is open. If the pipe was allowed to run with the drain for 2 hrs. and the drain was closed, it would require the pipe 4 more hrs. to fill the pool. How long would it take the pipe to fill the pool if the drain is closed from the start?

Thank you in advance! Hoping for your immediate reply.

Click here to see answer by sudhanshu_kmr(1152)

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