8y 2 5y 1 July 8, 2019 16 32 64 128 21x 5y 2 14x 8y 3 2 5y 5 8y 5 12 solve and check 8y 5y 2 16 5y 2 8y 100 y 2 4y 37 4y 3 5y 2 8y 10 8y 14 5y 2 5y 1 2 8y 5 1 2 8y 2 5y 7 2y 2 7y 11 2 5y 1 8y 7 2y 8y = 2(5 - y)