解方程3(0.7x+0.1)+2(0.25x-0.2)=5.1

问题描述:

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