题目内容
求未知数
3x-1.2x=36
=5:
x-
+
=
.
3x-1.2x=36
| X |
| 2.4 |
| 1 |
| 6 |
x-
| 7 |
| 10 |
| 1 |
| 5 |
| 2 |
| 3 |
(1)3x-1.2x=36,
1.8x=36,
1.8x÷1.8=36÷1.8,
x=20;
(2)
=5:
,
x=2.4×5,
x×6=12×6,
x=72;
(3)x-
+
=
,
x-
=
,
x-
+
=
+
,
x=1
.
1.8x=36,
1.8x÷1.8=36÷1.8,
x=20;
(2)
| x |
| 2.4 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 6 |
x=72;
(3)x-
| 7 |
| 10 |
| 1 |
| 5 |
| 2 |
| 3 |
x-
| 1 |
| 2 |
| 2 |
| 3 |
x-
| 1 |
| 2 |
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 2 |
x=1
| 1 |
| 6 |
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