3x - 4y - 15=0 ; y + x + 2=0. solve the equations by eliminating x
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3x-4y-15=0
multiply 2 eqn by 3
3x+3y+6=0
eliminate x
-7y-21=0
-7y=21
y=-3
multiply 2 eqn by 3
3x+3y+6=0
eliminate x
-7y-21=0
-7y=21
y=-3
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