题目内容
求未知数x.
7x+5×0.7=8.4
:36%=
:x.
7x+5×0.7=8.4
| 3 |
| 5 |
| 4 |
| 5 |
(1)7x+5×0.7=8.4,
7x+3.5=8.4,
7x+3.5-3.5=8.4-3.5,
7x÷7=4.9÷7,
x=0.7;
(2)
:36%=
:x,
x=36%×
,
x×
=0.288×
,
x=0.48.
7x+3.5=8.4,
7x+3.5-3.5=8.4-3.5,
7x÷7=4.9÷7,
x=0.7;
(2)
| 3 |
| 5 |
| 4 |
| 5 |
| 3 |
| 5 |
| 4 |
| 5 |
| 3 |
| 5 |
| 5 |
| 3 |
| 5 |
| 3 |
x=0.48.
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