题目内容
解方程.
(1)
=0.3
(2)
x+
x=42.
(1)
| x |
| 4 |
(2)
| 7 |
| 5 |
| 8 |
| 5 |
(1)
=0.3,
×4=0.3×4,
x=1.2;
(2)
x+
x=42,
3x=42,
3x÷3=42÷3,
x=14.
| x |
| 4 |
| x |
| 4 |
x=1.2;
(2)
| 7 |
| 5 |
| 8 |
| 5 |
3x=42,
3x÷3=42÷3,
x=14.
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