Question

解方程3/4x-16.8=20.6 7/8x-0.87=16.9 3÷2x=6.2 （1/2-5/11）*（5/9*2/

Answer 1

【参考答案】

①3/4x-16.8=20.6

3/4x=37.4

x=748/15

②7/8x-0.87=16.9

7/8x=17.77

x=3554/175

③3÷2x=6.2 (1/2-5/11)*(5/9*2/3)

3÷2x=6.2×(1/22)×(10/27)

3÷2x=31/297

2x=891/31

x=891/62

④8.6-3/4x=2.7

3/4x=5.9

x=118/15