8*x - 7*y = -13
8*x-7*y = -13
-7*y + 8*x = -13
x = -13 + 7*y / (8)
13 7*re(y) 7*I*im(y) x1 = - -- + ------- + --------- 8 8 8
x1 = 7*re(y)/8 + 7*i*im(y)/8 - 13/8