解方程3(0.7x+0.1)+2(0.25x-0.2)=5.1

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解方程3(0.7x+0.1)+2(0.25x-0.2)=5.1解方程3(0.7x+0.1)+2(0.25x-0.2)=5.1解方程3(0.7x+0.1)+2(0.25x-0.2)=5.13(0.7x十

解方程3(0.7x+0.1)+2(0.25x-0.2)=5.1
解方程3(0.7x+0.1)+2(0.25x-0.2)=5.1

解方程3(0.7x+0.1)+2(0.25x-0.2)=5.1
3(0.7x十0.1)十2(0.25x一0.2)=5.1
2.1x十0.3十0.5x一0.4=5.1
2.6x=5.2
x=2

2.1x+0.3+0.5x-0.4=5.1
2.6x-0.1=5.1
2.6x=5.2
x=2