题目内容

(1)3x-5.2-2.2x=6.8
(2)9.5(x-3)=76
(3)60x-7.5=35x
(4)x÷3-27=18.
(1)3x-5.2-2.2x=6.8
     0.8x-5.2+5.2=6.8+5.2
             0.8x=12
        0.8x÷0.8=12÷0.8
                x=15;

(2)9.5(x-3)=76
9.5(x-3)÷9.5=76÷9.5
          x-3=8
        x-3+3=8+3
            x=11;

(3)60x-7.5=35x
 60x-7.5-35x=35x-35x
 25x-7.5+7.5=0+7.5
         25x=7.5
     25x÷25=7.5÷25
           x=0.3;

(4)x÷3-27=18
 x÷3-27+27=18+27
       x÷3=45
    x÷3×3=45×3
          x=135.
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