题目内容
解方程.
| X-5%X=76 | 3x÷
|
|
(1)X-5%X=76,
0.95X=76,
0.95X÷0.95=76÷0.95,
X=80;
(2)3x÷
=48,
3x÷
×
=48×
,
3x=30,
3x÷3=30÷3,
x=10;
(3)
x-
x=1.2,
(
-
)x=1.2,
x=1.2,
x×12=1.2×12,
x=14.4.
0.95X=76,
0.95X÷0.95=76÷0.95,
X=80;
(2)3x÷
| 5 |
| 8 |
3x÷
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 8 |
3x=30,
3x÷3=30÷3,
x=10;
(3)
| 1 |
| 3 |
| 1 |
| 4 |
(
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 12 |
| 1 |
| 12 |
x=14.4.
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