题目内容
求未知数X的值:
0.75X-5×
=1.5;
:X=4
:10.
0.75X-5×
| 1 |
| 2 |
| 4 |
| 5 |
| 1 |
| 2 |
(1)0.75X-5×
=1.5,
0.75X-2.5+2.5=1.5+2.5,
0.75x=4,
0.75x÷0.75=4÷0.75,
x=5
;
(2)
:X=4
:10,
4
x=
×10,
4
x÷4
=8÷4
,
x=1
.
| 1 |
| 2 |
0.75X-2.5+2.5=1.5+2.5,
0.75x=4,
0.75x÷0.75=4÷0.75,
x=5
| 1 |
| 3 |
(2)
| 4 |
| 5 |
| 1 |
| 2 |
4
| 1 |
| 2 |
| 4 |
| 5 |
4
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
x=1
| 7 |
| 9 |
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