问题 解答题
解方程.
(1)6x-2x=0.72
(2)5x+3x=3.2×2
(3)2x-13×4=6(4)3(x-6)=27
(5)12-9+35x=73(6)9(x-8)=12×3.
答案

(1)6x-2x=0.72,

            4x=0.72,

         4x÷4=0.72÷4,

             x=0.18;

(2)5x+3x=3.2×2,

        8x=6.4,

     8x÷8=6.4÷8,

         x=0.8;

(3)2x-13×4=6,

     2x-52+52=6+52,

       2x÷2=58÷2,

           x=29;

(4)3(x-6)=27,

  3(x-6)÷3=27÷3,

        x-6+6=9+6,

            x=15;

(5)12-9+35x=73,

      3+35x-3=73-3,

      35x÷35=70÷35,

            x=2;

(6)9(x-8)=12×3,

  9(x-8)÷9=36÷9,

        x-8+8=4+8,

            x=12.

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