题目内容
求未知数x.
| 5x-0.7×3=6.6 |
| x÷(1-24%)=1.15. |
(1)5x-0.7×3=6.6,
5x-2.1=6.6,
5x-2.1+2.1=6.6+2.1,
5x=8.7,
5x÷5=8.7÷5,
x=1.74;
(2)
:x=5,
5x=
,
5x÷5=
÷5,
x=
;
(3)x÷(1-24%)=1.15,
x÷76%=1.15,
x÷76%×76%=1.15×76%,
x=0.874.
5x-2.1=6.6,
5x-2.1+2.1=6.6+2.1,
5x=8.7,
5x÷5=8.7÷5,
x=1.74;
(2)
| 1 |
| 5 |
5x=
| 1 |
| 5 |
5x÷5=
| 1 |
| 5 |
x=
| 1 |
| 25 |
(3)x÷(1-24%)=1.15,
x÷76%=1.15,
x÷76%×76%=1.15×76%,
x=0.874.
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