How do you do 2x plus y equals -12 -4x-2y equals 30?

Answer 1

2x+y=-12-4x-2y=30

x=-y/2+30, you plug this into -12-4x-2y=30 and get -12+2y-120-2y=30

which gives 2y-2y=162.

This is not possible, so the equation is unsolvable.