题目内容
解方程
χ+
=
χ-
χ=12
χ+0.1χ=110.
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 2 |
χ-
| 4 |
| 5 |
χ+0.1χ=110.
(1)
x+
=
,
x+
-
=
-
,
x=
,
x×
=
×
,
x=
;
(2)x-
x=12,
(1-
)x=12,
x=12,
x×5=12×5,
x=60;
(3)x+0.1x=110,
(1+0.1)x=110,
1.1x=110,
1.1x÷1.1=110÷1.1,
x=100.
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4 |
| 4 |
| 3 |
| 1 |
| 4 |
| 4 |
| 3 |
x=
| 1 |
| 3 |
(2)x-
| 4 |
| 5 |
(1-
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
x=60;
(3)x+0.1x=110,
(1+0.1)x=110,
1.1x=110,
1.1x÷1.1=110÷1.1,
x=100.
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