问题 解答题
解方程.
(1)X-6×
3
4
=
1
2

(2)(1-
5
9
)X=36
(3)
4
5
x=36.
答案

(1)x-6×

3
4
=
1
2

x-

9
2
=
1
2

x-

9
2
+
9
2
=
1
2
+
9
2

x=5;

(2)(1-

5
9
)x=36,

4
9
x=36,

4
9
x÷
4
9
=36÷
4
9

x=81;

(3)

4
5
x=36,

4
5
x÷
4
5
=36÷
4
5

x=45.

单项选择题
单项选择题