题目内容
求未知数x.
0.5:
=
:x
1.2:75=
5x-4.5×2=0.5.
0.5:
| 1 |
| 4 |
| 2 |
| 3 |
1.2:75=
| 0.4 |
| x |
5x-4.5×2=0.5.
(1)0.5:
=
:x
0.5x=
×
0.5x÷0.5=
÷0.5
x=
(2)1.2:75=
1.2x=75×0.4
1.2x÷1.2=30÷1.2
x=25
(3)5x-4.5×2=0.5
5x-9=0.5
5x-9+9=0.5+9
5x÷5=9.5÷5
x=1.9
| 1 |
| 4 |
| 2 |
| 3 |
0.5x=
| 1 |
| 4 |
| 2 |
| 3 |
0.5x÷0.5=
| 1 |
| 6 |
x=
| 1 |
| 3 |
(2)1.2:75=
| 0.4 |
| x |
1.2x=75×0.4
1.2x÷1.2=30÷1.2
x=25
(3)5x-4.5×2=0.5
5x-9=0.5
5x-9+9=0.5+9
5x÷5=9.5÷5
x=1.9
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