题目内容
直接写出等式中的x的值
(1)若9x+
-2x=1,则x=______
(2)若5:2x=1
:1,则x=______.
(1)若9x+
| 1 |
| 8 |
(2)若5:2x=1
| 1 |
| 9 |
(1)9x+
-2x=1,
7x+
-
=1-
,
7x÷7=
÷7,
x=
;
(2)5:2x=1
:1,
2x×1
=5×1,
x=5,
x÷
=5÷
,
x=2
.
| 1 |
| 8 |
7x+
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
7x÷7=
| 7 |
| 8 |
x=
| 1 |
| 8 |
(2)5:2x=1
| 1 |
| 9 |
2x×1
| 1 |
| 9 |
| 20 |
| 9 |
| 20 |
| 9 |
| 20 |
| 9 |
| 20 |
| 9 |
x=2
| 1 |
| 4 |
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