题目内容
解方程.
(1-
)x=
x+
x=34
x÷
=
÷
.
(1-
7 |
8 |
21 |
40 |
x+
7 |
10 |
x÷
7 |
15 |
15 |
36 |
5 |
24 |
(1)(1-
)x=
,
x=
,
x÷
=
÷
,
x=4.2;
(2)x+
x=34,
1.7x=34,
1.7x÷1.7=34÷1.7,
x=20;
(3)x÷
=
÷
,
x÷
=2,
x÷
=2÷
,
x=4
.
7 |
8 |
21 |
40 |
1 |
8 |
21 |
40 |
1 |
8 |
1 |
8 |
21 |
40 |
1 |
8 |
x=4.2;
(2)x+
7 |
10 |
1.7x=34,
1.7x÷1.7=34÷1.7,
x=20;
(3)x÷
7 |
15 |
15 |
36 |
5 |
24 |
x÷
7 |
15 |
x÷
7 |
15 |
7 |
15 |
x=4
2 |
7 |
练习册系列答案
相关题目