Is (–5, 0. 5) a solution of this system? x – 4y = –7, 0. 2x + 2y = 0 substitute (–5, 0. 5) into x – 4y = –7 to get. Substitute (–5, 0. 5) into 0. 2x + 2y = 0 to get. Simplify the above equations to get.