问题 解答题

5.5x-1.3x=12.6

3.85+1.5x=6.1

6x-0.9=4.5

4×4.5-3x=6.33.

答案

5.5X-1.3X=12.6,

4.2X=12.6,

4.2X÷4.2=12.6÷4.2,

X=3;

3.85+1.5X=6.1,

3.85+1.5X-3.85=6.1-3.85,

1.5X÷1.5=2.25÷1.5,

X=1.5;

6X-0.9=4.5,

6X-0.9+0.9=4.5+0.9,

6X÷6=5.4÷6,

X=0.9;

4×4.5-3X=6.33,

18-3X=6.33,

3X=18-6.33,

3X÷3=11.67÷3,

X=3.89.

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