问题 解答题
解方程
3x-60%x=288
1
2
-
1
3
x=
1
5
4
5
x-0.48=1.2.
答案

(1)3x-60%x=288,

2.4x=288,

2.4x÷2.4=288÷2.4,

x=120;

(2)

1
2
-
1
3
x=
1
5

1
2
-
1
3
x+
1
3
x=
1
5
+
1
3
x,

1
2
-
1
5
=
1
5
+
1
3
x-
1
5

3
10
=
1
3
x,

3
10
÷
1
3
=
1
3
x÷
1
3

x=

9
10

(3)

4
5
x-0.48=1.2,

4
5
x-0.48+0.48=1.2+0.48,

4
5
x=1.68,

4
5
x÷
4
5
=1.68÷
4
5

x=2.1.

问答题
单项选择题