题目内容
解方程.
(1)
-x=
(2)x+0.75-
=0.15(3)2x+
=4.625.
(1)
| 5 |
| 6 |
| 1 |
| 2 |
| 3 |
| 5 |
| 5 |
| 8 |
(1)
-x=
,
-x+x=
+x,
+x=
,
+x-
=
-
,
x=
;
(2)x+0.75-
=0.15,
x+0.75-
+
=0.15+
,
x+0.75=0.75,
x+0.75-0.75=0.75-0.75,
x=0;
(3)2x+
=4.625,
2x+
-
=4.625-
,
2x=4,
2x÷2=4÷2,
x=2.
| 5 |
| 6 |
| 1 |
| 2 |
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 2 |
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 2 |
| 5 |
| 6 |
| 1 |
| 2 |
x=
| 1 |
| 3 |
(2)x+0.75-
| 3 |
| 5 |
x+0.75-
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
x+0.75=0.75,
x+0.75-0.75=0.75-0.75,
x=0;
(3)2x+
| 5 |
| 8 |
2x+
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 8 |
2x=4,
2x÷2=4÷2,
x=2.
练习册系列答案
相关题目