题目内容
求未知数:
|
|
(1)
:
=
:x,
x=
×
,
x×3=
×3,
x=
;
(2)
-4.5+5.5=10,
+1=10,
+1-1=10-1,
×8=9×8,
x=72.
| 1 |
| 3 |
| 1 |
| 20 |
| 16 |
| 9 |
| 1 |
| 3 |
| 1 |
| 20 |
| 16 |
| 9 |
| 1 |
| 3 |
| 4 |
| 45 |
x=
| 4 |
| 15 |
(2)
| X |
| 8 |
| X |
| 8 |
| X |
| 8 |
| X |
| 8 |
x=72.
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