题目内容
如果4X+3Y=
,那么X+
Y=______.当Y=
时,X=______.
| 7 |
| 8 |
| 3 |
| 4 |
| 1 |
| 5 |
4X+3Y=
,
两边同时除以4,得X+
Y=
÷4=
;
当Y=
时,
4X+3×
=
,
4X+
=
,
4X+
-
=
-
,
4X÷4=
÷4,
X=
.
故答案为:
;
.
| 7 |
| 8 |
两边同时除以4,得X+
| 3 |
| 4 |
| 7 |
| 8 |
| 7 |
| 32 |
当Y=
| 1 |
| 5 |
4X+3×
| 1 |
| 5 |
| 7 |
| 8 |
4X+
| 3 |
| 5 |
| 7 |
| 8 |
4X+
| 3 |
| 5 |
| 3 |
| 5 |
| 7 |
| 8 |
| 3 |
| 5 |
4X÷4=
| 11 |
| 40 |
X=
| 11 |
| 160 |
故答案为:
| 7 |
| 32 |
| 11 |
| 160 |
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