题目内容
求未知数.
(x+2):
=0.5:
-14.5+15.5=10.
(x+2):
| 4 |
| 5 |
| 1 |
| 5 |
| X |
| 8 |
(1)(x+2):
=0.5:
,
×(x+2)=
×0.5,
×(x+2)×5=0.4×5,
x+2-2=2-2,
x=0;
(2)
-14.5+15.5=10,
+1=10,
+1-1=10-1,
×8=9×8,
x=72.
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 4 |
| 5 |
| 1 |
| 5 |
x+2-2=2-2,
x=0;
(2)
| x |
| 8 |
| x |
| 8 |
| x |
| 8 |
| x |
| 8 |
x=72.
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