问题 解答题
解方程:
3
4
=2
4X+
1
4
X=51
12÷
3
2
-
3
4
X=5.
答案

(1)X÷

3
4
=2

3
4
×
3
4
=2×
3
4

X=

3
2

(2)4X+

1
4
X=51

17
4
X=51

17
4
4
17
=51×
4
17

X=2;

(3)12÷

3
2
-
3
4
X=5

8-

3
4
X=5

8-

3
4
X+
3
4
X=5+
3
4
X

5+

3
4
X=8

5+

3
4
X-5=8-5

3
4
X=3

3
4
4
3
=3×
4
3

x=4.

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