题目内容
求未知数x.
①5x-0.8×10=3.19
②
:
=x:0.8.
①5x-0.8×10=3.19
②
| 1 |
| 2 |
| 3 |
| 8 |
(1)5x-0.8×10=3.19
5x-8=3.19,
5x-8+8=3.19+8,
5x=11.19,
5x÷5=11.19÷5,
x=2.238;
(2)
:
=x:0.8
x=
×0.8,
0.4=
x,
x÷
=0.4÷
,
x=3.2÷3,
x=1
.
5x-8=3.19,
5x-8+8=3.19+8,
5x=11.19,
5x÷5=11.19÷5,
x=2.238;
(2)
| 1 |
| 2 |
| 3 |
| 8 |
| 3 |
| 8 |
| 1 |
| 2 |
0.4=
| 3 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
x=3.2÷3,
x=1
| 1 |
| 15 |
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