题目内容
解方程.
| 5x-2=2.2 | 3x+2x=5.5 |
|
(1)5x-2=2.2,
5x-2+2=2.2+2,
5x=4.2,
5x÷5=4.2÷5,
x=0.84;
(2)3x+2x=5.5,
5x=5.5,
5x÷5=5.5÷5,
x=1.1;
(3)
x=
,
x×
=
×
,
x=
;
5x-2+2=2.2+2,
5x=4.2,
5x÷5=4.2÷5,
x=0.84;
(2)3x+2x=5.5,
5x=5.5,
5x÷5=5.5÷5,
x=1.1;
(3)
| 2 |
| 3 |
| 14 |
| 15 |
| 2 |
| 3 |
| 3 |
| 2 |
| 14 |
| 15 |
| 3 |
| 2 |
x=
| 7 |
| 5 |
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