Question

What is the value of y in the solution to the following system of equations?
2x + y = -4
5x + 3y = -6

8
6
-6
-8

Answer 1

so solve the system of equations :)

Answer 2

I would if I knew what to do :(

Answer 3

cancel out "x" from both

Answer 4

What you're going to want to do is eliminate the x's in both equations and keep only the y's. You could either multiply the first equation by 5 on both sides and multiply the second by 2 on both sides and subtract both equations, or isolate x and substitute the value you get for x in either equation.

Answer 5

2x + y = -4 # multiply it by 5
5x + 3y = -6 # multiply it by -2

what would you get?

Answer 6

still kinda confused

Answer 7

There you go, and then just subtract the equations. (for instance you would cancel the x's because they would both be 10 - 10 = 0

Answer 8

ohhh

Answer 9

Remember to multiply everything by 5! Then, solve either equation for y and there you have it!

Answer 10

alright thanks

Answer 11

so its y = 8