题目内容
解方程:
χ÷
=
χ+
χ=135χ-
=
.
χ÷
| 11 |
| 21 |
| 7 |
| 33 |
| 3 |
| 10 |
| 5 |
| 6 |
| 1 |
| 6 |
(1)χ÷
=
,
χ÷
×
=
×
,
x=
;
(2)χ+
χ=13,
x=13,
x÷
=13÷
,
x=10;
(3)5χ-
=
,
5χ-
+
=
+
,
5x÷5=1÷5,
x=0.2.
| 11 |
| 21 |
| 7 |
| 33 |
χ÷
| 11 |
| 21 |
| 11 |
| 21 |
| 7 |
| 33 |
| 11 |
| 21 |
x=
| 1 |
| 9 |
(2)χ+
| 3 |
| 10 |
| 13 |
| 10 |
| 13 |
| 10 |
| 13 |
| 10 |
| 13 |
| 10 |
x=10;
(3)5χ-
| 5 |
| 6 |
| 1 |
| 6 |
5χ-
| 5 |
| 6 |
| 5 |
| 6 |
| 1 |
| 6 |
| 5 |
| 6 |
5x÷5=1÷5,
x=0.2.
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