题目内容
求未知数x.
:
=
:x
=
x:
=2:3.
| 1 |
| 3 |
| 1 |
| 6 |
| 2 |
| 3 |
| x |
| 1.7 |
| 7 |
| 51 |
x:
| 3 |
| 4 |
(1)
:
=
:x
x=
×
x÷
=
÷
x=
(2)
=
51x=1.7×7
51x÷51=11.9÷51
x=
(3)x:
=2:3
3x=
×2
3x÷3=
÷3
x=
.
| 1 |
| 3 |
| 1 |
| 6 |
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 6 |
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 9 |
| 1 |
| 3 |
x=
| 1 |
| 3 |
(2)
| x |
| 1.7 |
| 7 |
| 51 |
51x=1.7×7
51x÷51=11.9÷51
x=
| 7 |
| 30 |
(3)x:
| 3 |
| 4 |
3x=
| 3 |
| 4 |
3x÷3=
| 3 |
| 2 |
x=
| 1 |
| 2 |
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