Question

2x−15y=−10 −4x+5y=−30
Solve the following system for y:

Answer 1

10

Explanation:

multiply the first equation by 2 in order to be able to cancel out the -4z and the 2x

4x-30y=-20

-4x+5y=-30

50y+5y = -20+(-30)

55y=-50