解:a÷10+2.52=a即a-a÷10=2.52即9/10a=2.52即a=2.52÷9/10即a=2.8
a是2.8a÷10+2.52=a解:1/10a+2.52=aa-1/10a=2.520.9a=2.52a=2.52÷0.9a=2.8
a/10=0.1a0.1a+2.52=a2.52=a-0.1a2.52=0.9aa=2.52/0.9a=2.8