题目内容
| 解方程: 130%X+X=460 | 2X-4×
| X-15%X=3.74. |
(1)130%X+X=460,
2.3X=460,
2.3X÷2.3=460÷2.3,
X=200;
(2)2X-4×
=
,
2X-
=
,
2X-
+
=
+
,
2X÷2=2÷2,
X=1;
(3)X-15%X=3.74,
0.85X=3.74,
0.85X÷0.85=3.74÷0.85,
X=4.4.
2.3X=460,
2.3X÷2.3=460÷2.3,
X=200;
(2)2X-4×
| 3 |
| 8 |
| 1 |
| 2 |
2X-
| 3 |
| 2 |
| 1 |
| 2 |
2X-
| 3 |
| 2 |
| 3 |
| 2 |
| 1 |
| 2 |
| 3 |
| 2 |
2X÷2=2÷2,
X=1;
(3)X-15%X=3.74,
0.85X=3.74,
0.85X÷0.85=3.74÷0.85,
X=4.4.
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