-x + y = -1 *hint: those are both 1y
2x - y = 0
solve using elimination (algebra)

x = -1

y= -2

Step-by-step explanation:

-x + y = -1

2x - y = 0

Add the two equations together to eliminate y

-x + y = -1

2x - y = 0

x +0y  = -1

x = -1

Now find y

-x+y = -1

-(-1) + y = -1

1+y = -1

Subtract 1 from each side

y = -1-1

y = -2

x=30

step-by-step explanation:

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