问题 解答题
解方程
X-0.42=6.9        
5X=1.3
X÷0.08=2.5           
X+
3
8
=
5
6
答案

(1)X-0.42=6.9,

X-0.42+0.42=6.9+0.42,

X=7.32;

(2)5X=1.3,

5X÷5=1.3÷5,

X=0.26;

(3)X÷0.08=2.5,

X÷0.08×0.08=2.5×0.08,

X=0.2;

(4)X+

3
8
=
5
6

X+

3
8
-
3
8
=
5
6
-
3
8

X=

11
24

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