题目内容
求未知数X的值
(1)3x-2.15x=8.5
(2)50%-30=52
(3)x:2.4=5:
.
(1)3x-2.15x=8.5
(2)50%-30=52
(3)x:2.4=5:
| 1 |
| 6 |
(1)3x-2.15x=8.5,
0.85x=8.5,
0.85x÷0.85=8.5÷0.85,
x=10;
(2)50%x-30=52,
50%x-30+30=52+30,
50%x=82,
50%x÷50%=82÷50%,
x=164;
(3)x:2.4=5:
,
x=2.4×5,
x=12,
x÷
=12÷
,
x=72.
0.85x=8.5,
0.85x÷0.85=8.5÷0.85,
x=10;
(2)50%x-30=52,
50%x-30+30=52+30,
50%x=82,
50%x÷50%=82÷50%,
x=164;
(3)x:2.4=5:
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 6 |
x=72.
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