5 5y 4 ) 2y 7 July 8, 2019 16 32 64 128 5 5y 4 )+ 2y 7 5 6 - 7y = - 4(2y - 0 9) + 2 4 5 + 5 + 7 5 4(3y - 2) - 7 2(2y - 3) = 1 2
