2x−15y=−10 −4x+5y=−30
Solve the following system for y:
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Answer:
10
Step-by-step 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