问题
解答题
解方程.
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答案
(1)25-X=8.5,
25-X+X=8.5+X,
8.5+X=25,
8.5+X-8.5=25-8.5,
X=16.5;
(2)X÷0.15=0.15,
X÷0.15×0.15=0.15×0.15,
X=0.0225;
(3)0.24X=31.2,
0.24X÷0.24=31.2÷0.24,
X=130.
解方程.
|
(1)25-X=8.5,
25-X+X=8.5+X,
8.5+X=25,
8.5+X-8.5=25-8.5,
X=16.5;
(2)X÷0.15=0.15,
X÷0.15×0.15=0.15×0.15,
X=0.0225;
(3)0.24X=31.2,
0.24X÷0.24=31.2÷0.24,
X=130.