题目内容
求未知数x.
16+5%x=24
x-0.4x=0.72
x:
=14:
.
16+5%x=24
x-0.4x=0.72
x:
| 2 |
| 7 |
| 2 |
| 5 |
(1)16+5%x=24
16+0.05x=24
16+0.05x-16=24-16
0.05x=8
0.05x÷0.05=8÷0.05
x=160;
(2)x-0.4x=0.72
0.6x=0.72
0.6x÷0.6=0.72÷0.6
x=1.2;
(3)x:
=14:
x=14×
x=4÷
x=10.
16+0.05x=24
16+0.05x-16=24-16
0.05x=8
0.05x÷0.05=8÷0.05
x=160;
(2)x-0.4x=0.72
0.6x=0.72
0.6x÷0.6=0.72÷0.6
x=1.2;
(3)x:
| 2 |
| 7 |
| 2 |
| 5 |
| 2 |
| 5 |
| 2 |
| 7 |
x=4÷
| 2 |
| 5 |
x=10.
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