问题 解答题
求x.
2
3
:(x+1)=
1
4
2
5
506×3-
3
2
x=33.
答案

(1)

2
3
:(x+1)=
1
4
2
5

1
4
x+
1
4
=
2
3
×
2
5

1
4
x+
1
4
-
1
4
=
4
15
-
1
4

1
4
x÷
1
4
=
1
60
÷
1
4

x=

1
15

(2)506×3-

3
2
x=33,

1518-

3
2
x+
3
2
x=33+
3
2
x,

1518-33=33+

3
2
x-33,

1485÷

3
2
=
3
2
x÷
3
2

x=990.

单项选择题 B1型题
名词解释