2y 4x 2 x 2y 7 July 8, 2019 16 32 64 128 Solve the system by substitution 2y 4x 2 x 2y 7 X 2y '= 4x 2 7xy 2y 2 4x x 2y 5xy 2 7x 2y 2x + y = 4
