Question 305695
multiplying the first equation by 2 ___ -4x = 8y - 28


adding the second equation ___ -4x + 5y = 8y - 28 + 31 - 4x


adding 4x ___ 5y = 8y + 3 ___ y = -1


substituting ___ -2x = 4(-1) - 14 ___ x = 9