问题 解答题

0.6x+5.28=6

3.2x+1.7x=9.8

6.3x-3.9x=2.88.

答案

0.6x+5.28=6

    0.6x-5.28=6-5.28,

         0.6x=0.72,

    0.6x÷0.6=0.72÷0.6,

            x=1.2;

3.2x+1.7x=9.8,

     4.9x=9.8,

        x=2;

6.3x-3.9x=2.88

     2.4x=2.88,

2.4x÷2.4=2.88÷2.4,

        x=1.2.

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