题目内容
解下列方程.
5Y-2Y=18
+X=
X-
=
.
5Y-2Y=18
| 3 |
| 5 |
| 7 |
| 10 |
| 3 |
| 4 |
| 1 |
| 12 |
(1)5Y-2Y=18,
3Y=18,
3Y÷3=18÷3,
Y=6;
(2)
+x=
,
+x-
=
-
,
x=
;
(3)x-
=
,
x-
+
=
+
,
x=
.
3Y=18,
3Y÷3=18÷3,
Y=6;
(2)
| 3 |
| 5 |
| 7 |
| 10 |
| 3 |
| 5 |
| 3 |
| 5 |
| 7 |
| 10 |
| 3 |
| 5 |
x=
| 1 |
| 10 |
(3)x-
| 3 |
| 4 |
| 1 |
| 12 |
x-
| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 12 |
| 3 |
| 4 |
x=
| 5 |
| 6 |
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