题目内容
求未知数
(1)
:
=
:x
(2)3×0.7+4x=6.5.
(1)
| 1 |
| 3 |
| 1 |
| 20 |
| 5 |
| 9 |
(2)3×0.7+4x=6.5.
(1)
:
=
:x
x=
×
x÷
=
÷
x=
;
(2)3×0.7+4x=6.5
2.1+4x-2.1=6.5-2.1
4x÷4=4.4÷4
x=1.1.
| 1 |
| 3 |
| 1 |
| 20 |
| 5 |
| 9 |
| 1 |
| 3 |
| 1 |
| 20 |
| 5 |
| 9 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 36 |
| 1 |
| 3 |
x=
| 1 |
| 12 |
(2)3×0.7+4x=6.5
2.1+4x-2.1=6.5-2.1
4x÷4=4.4÷4
x=1.1.
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