问题 解答题
32-22X=10    (200-X)÷5=30    (18X-2)=270    100-20X=20+30X.
答案

(1)32-22X=10,

32-22X+22X=10+22X,

 22X+10-10=32-10,

       22X=22,

   22X÷22=22÷22,

         X=1;

(2)(200-X)÷5=30,

  (200-X)÷5×5=30×5,

           200-X=150,

         200-X+X=150+X,

           X+150=200,

       X+150-150=200-150,

               X=50;

(3)18X-2=270,

   18X-2+2=270+2,

       18X=272,

   18X÷18=272÷18,

         X=15

1
9

(4)100-20X=20+30X,

 100-20X+20X=20+30X+20X,

      50X+20=100,

   50X+20-20=100-20,

         50X=80,

     50X÷50=80÷50,

           X=1.6.

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