题目内容
解方程.
(1)
=
:
(2)23x-18=32+3x.
(1)
| x |
| 2.4 |
| 3 |
| 8 |
| 9 |
| 10 |
(2)23x-18=32+3x.
(1)
=
:
,
x=2.4×
,
x=0.9,
x÷
=0.9÷
,
x=1;
(2)23x-18=32+3x,
23x-18+18=32+3x+18,
23x-3x=50+3x-3x,
20x=50,
20x÷20=50÷20,
x=2.5.
| x |
| 2.4 |
| 3 |
| 8 |
| 9 |
| 10 |
| 9 |
| 10 |
| 3 |
| 8 |
| 9 |
| 10 |
| 9 |
| 10 |
| 9 |
| 10 |
| 9 |
| 10 |
x=1;
(2)23x-18=32+3x,
23x-18+18=32+3x+18,
23x-3x=50+3x-3x,
20x=50,
20x÷20=50÷20,
x=2.5.
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