Solve linear equation y=4-x y=x-4
{ y = 4 - x y = x - 4Subsititute y = x - 4[ ( x - 4 )] = 4 - x ]isolate x for ( x - 4 ) = 4 - xx = 4For y = x - 4Subsititute x = 4y = 4 - 4y = 0Solution x = 4 and y = 0hope this helps!