题目内容
求未知数x.
| 4x+3×0.7=6.5 |
|
|
(1)4x+3×0.7=6.5,
4x+2.1-2.1=6.5-2.1,
4x=4.4,
4x÷4=4.4÷4,
x=1.1;
(2)
:
=
:x,
x=
×
,
x÷
=
÷
,
x=
;
(3)
=
,
3.6x=1.5×1.8,
3.6x=2.7,
3.6x÷3.6=2.7÷3.6,
x=
.
4x+2.1-2.1=6.5-2.1,
4x=4.4,
4x÷4=4.4÷4,
x=1.1;
(2)
| 1 |
| 2 |
| 1 |
| 5 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 5 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 20 |
| 1 |
| 2 |
x=
| 1 |
| 10 |
(3)
| 1.5 |
| x |
| 3.6 |
| 1.8 |
3.6x=1.5×1.8,
3.6x=2.7,
3.6x÷3.6=2.7÷3.6,
x=
| 3 |
| 4 |
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