4Y+11=22y=11/4 3X*9=5x=5/27 8Z/6=48z=36 3X+7=59x=52/3 4Y-69=81y=75/4 8X*6=5x=5/48 7Z/9=4y=63/7 15......
1.3/7×49/9-4/3 2.8/9×15/36+1/27 3.12×5/6–2/9×3 4.8× 5/4+1/4 5.6÷3/8–3/8÷6 6.4/7×5/9+3/7×5/9 7.5/2......