题目内容
求未知数x.
(1)6.5+3x=15.5(2)x:
=12:
.
(1)6.5+3x=15.5(2)x:
| 3 |
| 4 |
| 1 |
| 8 |
(1)6.5+3x=15.5,
6.5+3x-6.5=15.5-6.5,
3x=9,
3x÷3=9÷3,
x=3;
(2)x:
=12:
,
x=
×12,
x=9,
x×8=9×8,
x=72.
6.5+3x-6.5=15.5-6.5,
3x=9,
3x÷3=9÷3,
x=3;
(2)x:
| 3 |
| 4 |
| 1 |
| 8 |
| 1 |
| 8 |
| 3 |
| 4 |
| 1 |
| 8 |
| 1 |
| 8 |
x=72.
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