Answer:
x=10, y=-1
(10,-1)
Step-by-step explanation:
x-y=11
2x+y=19
Add these two equations together to eliminate y
x-y=11
2x+y=19
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3x = 30
Divide each side by 3
3x/3 = 30/3
x = 10
Now we need to find y
2x+y = 19
2(10) +y = 19
20+y =19
Subtract 20 from each side
20-20 +y = 19-20
y= -1
