4*x + 13*y = 13
4*x+13*y = 13
x = 13 - 13*y / (4)
13 13*re(y) 13*I*im(y) x1 = -- - -------- - ---------- 4 4 4
x1 = -13*re(y)/4 - 13*i*im(y)/4 + 13/4