5×(x+2.1)=145
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答案26.9解:5x(x+2.1)➗5=145➗5,x+2.1=29,x+2.1-2.1=29-2.1,x=26.9
咨询记录 · 回答于2022-11-25
5×(x+2.1)=145
答案26.9解:5x(x+2.1)➗5=145➗5,x+2.1=29,x+2.1-2.1=29-2.1,x=26.9
答案26.9解:5x(x+2.1)➗5=145➗5,x+2.1=29,x+2.1-2.1=29-2.1,x=26.9
(x-6)÷2=7.5
解:(x-6)➗2x2=7.5x2,x-6=15,x-6+6=15+6,x=21