来自刘家红的问题
五年级解方程5(x-4)-1.2(13-x)=2x+2.2,
五年级解方程5(x-4)-1.2(13-x)=2x+2.2,
1回答
2020-04-22 19:47
五年级解方程5(x-4)-1.2(13-x)=2x+2.2,
五年级解方程5(x-4)-1.2(13-x)=2x+2.2,
5(x-4)-1.2(13-x)=2x+2.2
5x-20-15.6+1.2x=2x+2.2
5x+1.2x-2x=2.2+20+15.6
4.2x=37.8
x=37.8÷4.2
x=9