解方程3题(4x-1.6)除以4/5=62x+3(5/4x+2.5)=3.5x-(5/4x+2.5)=3.5

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解方程3题(4x-1.6)除以4/5=62x+3(5/4x+2.5)=3.5x-(5/4x+2.5)=3.5
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解方程3题(4x-1.6)除以4/5=62x+3(5/4x+2.5)=3.5x-(5/4x+2.5)=3.5
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

解方程3题(4x-1.6)除以4/5=62x+3(5/4x+2.5)=3.5x-(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)=24
20x-8=24
20x=32
x=32/20=8/5

x=1.6
2x+3(5/4x+2.5)=3.5
2x+15x/4+7.5=3.5(通分)
8x+15x+7.5*4=3.5*4
23x=-16
x=-16/23
x-(5/4x+2.5)=3.5
x-5x/4-2.5=3.5
-x/4=6
x=-24