题目内容
解方程.
5×
| 2:
| 2x-
|
①5×
+
x=1
3+
x=1
3+
x-3=1-3
x=-2
x×2=-2×2
x=-4
②2:
=
2:0.8=x:7
0.8x=14
0.8x÷0.8=14÷0.8
x=17.5
③2x-
=-
2x-
+
=-
+
2x=0
x=0
| 3 |
| 5 |
| 1 |
| 2 |
3+
| 1 |
| 2 |
3+
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
x=-4
②2:
| 4 |
| 5 |
| x |
| 7 |
2:0.8=x:7
0.8x=14
0.8x÷0.8=14÷0.8
x=17.5
③2x-
| 3 |
| 5 |
| 3 |
| 5 |
2x-
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
2x=0
x=0
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