问题 解答题
解方程:
5X-3×
10
7
=
5
7
5-
2
3
X=
1
3
2X-
4
3
X=
1
2
答案

(1)5X-3×

10
7
=
5
7

5X-

30
7
+
30
7
=
5
7
+
30
7

5x÷5=5÷5,

x=1;

(2)5-

2
3
X=
1
3

5-

2
3
X+
2
3
x=
1
3
+
2
3
x,

5-

1
3
=
1
3
+
2
3
x-
1
3

14
3
÷
2
3
=
2
3
x÷
2
3

x=7;

(3)2X-

4
3
X=
1
2

2
3
x=
1
2

2
3
x÷
2
3
=
1
2
÷
2
3

x=

3
4

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