解方程．0.273÷x=0.35x×1.6=0.864x×3.6=0.864x÷0.756=90．

Question

解方程． 0.273÷x=0.35

x×1.6=0.864

x×3.6=0.864

x÷0.756=90．

Answer 1

①0.273÷x=0.35
   0.273×(1)/(x)×x=0.35×x
         0.35x=0.273
   0.35x÷0.35=0.273÷0.35
             x=(273)/(350)；

 ②x×1.6=0.864
1.6x÷1.6=0.864÷1.6
        x=0.54

 ③x×3.6=0.864
     3.6x=0.864
3.6x÷3.6=0.864÷3.6
        x=0.24；

    ④x÷0.756=90
      x÷(756)/(1000)=90
x×(1000)/(756)×(756)/(1000)=90×(756)/(1000)
            x=68.04；