8y 2 5y 7 July 8, 2019 16 32 64 128 8y 2 5y 7 2y 2 7y 11 5y 8y 2 7y 4 8y 2 2y 4 )+( 5y 2 7y 2 5y 1 8y 7 2y 8y = 2(5 - y)
