问题 解答题
解方程:
(1)8.7X-1.8X=20.7
(2)X÷1.2=6.5
(3)X-
5
8
=
1
2
答案

(1)8.7X-1.8X=20.7,

6.9X÷6.9=20.7÷6.9,

X=3;

(2)X÷1.2=6.5,

X÷1.2×1.2=6.5×1.2,

X=7.8;

(3)X-

5
8
=
1
2

X-

5
8
+
5
8
=
1
2
+
5
8

X=1

1
8

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