问题 解答题

解方程:

1-0.85x=0.15

1.6x-0.68x=0.184

1.2×5+5x=6.6.

答案

(1)1-0.85x=0.15,

1=0.15+0.85x,

1-0.15=0.15+0.85x-0.15,

0.85÷0.85=0.85x÷0.85,

x=1;

(2)1.6x-0.68x=0.184,

0.92x=0.184,

0.92x÷0.92=0.184÷0.92,

x=0.2;

(3)1.2×5+5x=6.6,

6+5x-6=6.6-6,

5x÷5=0.6÷5,

x=0.12.

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