Question

Solve using the addition method
-3x+y=-2
-28x+4y=8

Answer 1

are you solving for x and y?
addition method of what?

Answer 2

yes im solving for x and y and i meant elimination method

Answer 3

@britanyashton

Answer 4

@BunnyBree can you help?

Answer 5

oh. okay. i get this. If bunnyBee doesnt know, then ill help.

Answer 6

thank you

Answer 7

Okay, so if this if for the elimination method, we need to eliminate one of the variables to solve for another.
So, eliminating y would be easier than eliminating x. Multiply the first equation by -4.
(-3x+y=-2) x -4
-28x+4y=8
We get:
12x -4y = 8
-28x + 4y = 8
See how -4y and 4y cancel each other?
Now we have:
12x = 8
-28x = 8
Add.
-16x = 16
Divide to isolate x.
x = -1 <---- One of the solutions.
Now just plug x into one of the original equations to obtain y.

Answer 8

would y = -6?

Answer 9

I'm going to just choose the first equation and plug x in.
-3x+y=-2
-3(-1) + y = -2
3 + y = -2
Subtract 3 from both sides.
y = -5
So, your solutions are: x = -1, and y = -5. (:

Answer 10

Do you understand how I got -5 for y?

Answer 11

yeah thanks

Answer 12

You're welcome. (: