Question

Solve x + 2y = 50
-2x + 3y = 40
5x + 5y + 5z = 300
Answer

(10, 20, 30)

(-10, -20, -30)

(10, 20, -30)

(10, -20, 30)

Answer 1

you can use elimination or substitution

Answer 2

In this case, substitution is easier. Choose one of the first two formulas and isolate x or y

Answer 3

Thanks!

Answer 4

Yep! Can you get it from here?

Answer 5

yes! I figured it out. I just wasnt sure how to go about it.