解方程:12+(7-4.2x)=14.25
问题描述:
解方程:12+(7-4.2x)=14.25
答
解:7-4.2x=14.25-12
4.2x=7-2.25
x=4.75÷4.2
x=95/84
答
双休想念日记住
答
12+(7-4.2x)=14.25
19-4.2x=14.25
4.2x=4.75
x=95/84