题目内容
求未知数χ.
(1)
χ+2×5=16
(2)4χ-50%χ=10.5
(3)
:
=χ:50.
(1)
| 2 |
| 3 |
(2)4χ-50%χ=10.5
(3)
| 3 |
| 10 |
| 1 |
| 5 |
(1)
x+2×5=16,
x+10=16,
x+10-10=16-10,
x×
=6×
,
x=9;
(2)4x-50%x=10.5,
3.5x=10.5,
3.5x÷3.5=10.5÷3.5,
x=3;
(3)
:
=x:50,
x=
×50,
x×5=15×5,
x=75.
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 2 |
| 3 |
| 2 |
x=9;
(2)4x-50%x=10.5,
3.5x=10.5,
3.5x÷3.5=10.5÷3.5,
x=3;
(3)
| 3 |
| 10 |
| 1 |
| 5 |
| 1 |
| 5 |
| 3 |
| 10 |
| 1 |
| 5 |
x=75.
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