X y 10 x 2y 4 July 8, 2019 16 32 64 128 X y 10 4x 2y 34 X y z 6 x 2y 3z 10 x 2y 4z 1 X 4 y /- 10 và x 2y 12 3 x 4 y 10 x 2y 2 3 x 4 y 10 2 x 2y 2 substitution method X 2y z 10 3x y 9 − x 2y 4 3 x + 4 y = 10 and 2x - 2y = 2 Solve 3 x 4 y 10 2 x 2y 2
