2x = 4y y = 5

2x = 4y y = 5 x = 2y y = 5 x = 10 y = 5

2x = 4y y = 5 2x=4*5 y=5 2x=20 /:2 y=5 x=10 y=5

2x = 4y y = 5 2x=4x5 2x=20 | :2 x=10