题目内容
求未知数x.
=
x+
x=
2.5×8-3x=2.
| x |
| 2 |
| 0.15 |
| 0.6 |
| 2 |
| 3 |
| 3 |
| 4 |
| 1 |
| 6 |
(1)
=
,
×2=
×2,
x=0.5;
(2)
x+
x=
,
x=
,
x÷
=
÷
,
x=
;
(3)2.5×8-3x=2,
3x=2.5×8-2,
3x=18,
3x÷3=18÷3,
x=6.
| x |
| 2 |
| 0.15 |
| 0.6 |
| x |
| 2 |
| 0.15 |
| 0.6 |
x=0.5;
(2)
| 2 |
| 3 |
| 3 |
| 4 |
| 1 |
| 6 |
| 17 |
| 12 |
| 1 |
| 6 |
| 17 |
| 12 |
| 17 |
| 12 |
| 1 |
| 6 |
| 17 |
| 12 |
x=
| 2 |
| 17 |
(3)2.5×8-3x=2,
3x=2.5×8-2,
3x=18,
3x÷3=18÷3,
x=6.
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