x+2y=-1and 2x-3y=12
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x+2y=-1
x=-1-2y
Then,
2x-3y=12
2(-1-2y)-3y=12
-2-4y-3y= 12
-2-7y=12
-7y=14
y=(-14)/7
y=-2
Now,
x+2y= -1
x-4=-1
x= 3
So, x= 3
y= -2
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