Answer:
x-2y=10-------equation 1
3x+y=-12-------equation 2
multiply equation 1 by 3 and subtract eqn 2 by equation 1 then we get,
3x-6y=30
3x+y=-12
(-) (-) (+)
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-7y=42
or, -y= 42÷7
or, y=-6
put the value of y in equation 1
x-2×(-6)=10
or, x+12=10
or x=10-12
or, x = -2
therefore x = -2 and y=-6 ans.
