Linear equation in two variables (primary school)

x - 4y 6 x - 5y -2 (5y - x 2) x - 4y 6 5y - x 2 x - 4y 6 - x 5y 2 y 6 2 8 x 4y 6 4 * 8 6 32 6 38 x 5y - 2 5 * 8 - 2 40 - 2 38