题目内容
求未知数χ的值.
(1)
×
-x=
(2)
:
=
:x.
(1)
| 3 |
| 7 |
| 1 |
| 2 |
| 1 |
| 8 |
| 1 |
| 3 |
| 1 |
| 20 |
| 5 |
| 9 |
(1)
×
-x=
,
-x=
,
-x+x=
+x,
=
+x,
-
=
+x-
,
x=
;
(2)
:
=
:x,
x=
×
,
x÷
=
×
÷
,
x=
.
| 3 |
| 7 |
| 1 |
| 2 |
| 1 |
| 8 |
| 3 |
| 14 |
| 1 |
| 8 |
| 3 |
| 14 |
| 1 |
| 8 |
| 3 |
| 14 |
| 1 |
| 8 |
| 3 |
| 14 |
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
x=
| 5 |
| 56 |
(2)
| 1 |
| 3 |
| 1 |
| 20 |
| 5 |
| 9 |
| 1 |
| 3 |
| 1 |
| 20 |
| 5 |
| 9 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 20 |
| 5 |
| 9 |
| 1 |
| 3 |
x=
| 1 |
| 12 |
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