Question

Solve the system using an equivalent system.
-2x-y=0
3x-y=10


a.) 4, –2)
b.) (–2, 4)
c.) (2, –4)
d.) (–4, 2)

Answer 1

@julianstanley I need help!!! ):

Answer 2

This is just like the other one, they try to say "equivalent system" to throw you off. You know how I multiplied the other system in the last problem by -2? By doing that, I turned the equation into a new equation that equals the old one.

So for this one, im going to multiply the top equation by -1, which will turn it into
2x+y=0

Now, using elimination, I get the equation 5x=10, which you solve to get your x coordinate

Answer 3

so x=2 and y= ??

Answer 4

is it -4??

Answer 5

It would be -4. Once you get x, plug the value of x into one of the original equations. Ill pick the first one.
-2(2)-y=0
-4-y=0
-y=4
y=-4

Answer 6

Yesss!(: Thank you so much! Will you help me with one more??