25/4÷x=5/3
25/4x=5/3
20x=75
x=15/4
5-5X/8=10/3
两边*24
120-15x=80
15x=120-80
x=40/15
x=8/3还有 5-8分之5X=3分之10呢5-5X/8=10/3两边*24120-15x=8015x=120-80x=40/15x=8/3