解方程3题

问题描述:

解方程3题
(4x-1.6)除以4/5=6

2x+3(5/4x+2.5)=3.5
x-(5/4x+2.5)=3.5

(4x-1.6)除以4/5=6(4x-1.6)÷4/5=6(4x-1.6)*5/4=6(通分)5(4x-1.6)=2420x-8=2420x=32x=32/20=8/5或x=1.62x+3(5/4x+2.5)=3.52x+15x/4+7.5=3.5(通分)8x+15x+7.5*4=3.5*423x=-16x=-16/23x-(5/4x+2.5)=3.5...