Question

Solve the following system of equations for x.

-x + 8y = 4

-11x + 16y = - 64

Answer 1

Well first you have to multiply one of the equations by a number that will allow you to cancel out x or y.

Answer 2

this is really frustrating bc it doesn't tell me what y is but it wants me to find x but I cant without knowing what y is

Answer 3

Actually you can. To find x you have to cancel y. What is (8)-2?

Answer 4

-10?

Answer 5

8 multiplied by 2 is 16. Because the two is negative, the answer will be -16.

Answer 6

oh wait i thought you meant to say (-8)-2 sorry

Answer 7

Now multiply the top equation by -2

Answer 8

That's okay :)

Answer 9

and use y=-2, right?

Answer 10

No. You will have to use the distributive property. The equation should look like this
-2(-x+8y=4)

Answer 11

oh dang it my test shut down and i cant bring it back up. Thanks for the help though.

Answer 12

Oh ok. Well you're welcome.