Question

Solve the following system of equations.
3x-8y=7
-3x+13y=-17

Answer 1

\[3x-8y=7\]\[-3x+13y=-17\]

What would you get if you added both equations together? Do it like a big addition problem:

3x - 8y = 7
-3x + 13y = -17
---------------
?

Answer 2

@whpalmer4 y=-2?

Answer 3

Yes! (Sorry, didn't notice you had responded)

Now use that value of y in either of the original equations to find the value of x. What do you get?

Answer 4

I lost my pencil, ive me a sec lol

Answer 5

Good mental practice to try doing it in your head!

Answer 6

then plug x and y into both equations to see if they work correct?

Answer 7

I got it! :D x=-3 and y=-2

Answer 8

Did you check them?

The answers are correct. Good job!