3/4*(X-10)=4X/5-30+10

问题描述:

3/4*(X-10)=4X/5-30+10

871*120/60
=871*(120/60)
=871*2
=1742
2的3次方 乘 2分之1的3次方 = (2乘 2分之1)的3次方 = (1)

3/4(x-10)=4x/5-20
两边乘20
15x-150=16x-400
16x-15x=400-150
x=250