题目内容
求未知数χ.
5χ-0.7×3=6.6
:χ=5.
5χ-0.7×3=6.6
| 1 |
| 5 |
(1)5x-0.7×3=6.6,
5x-2.1=6.6,
5x-2.1+2.1=6.6+2.1,
5x÷5=8.7÷5,
x=1.74;
(2)
:x=5,
5x=
,
5x÷5=
÷5,
x=
.
5x-2.1=6.6,
5x-2.1+2.1=6.6+2.1,
5x÷5=8.7÷5,
x=1.74;
(2)
| 1 |
| 5 |
5x=
| 1 |
| 5 |
5x÷5=
| 1 |
| 5 |
x=
| 1 |
| 25 |
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