题目内容
若
+
=75%,
+
+
=
,则c=
1 |
a |
1 |
b |
1 |
a |
1 |
b |
1 |
c |
5 |
6 |
12
12
.分析:根据
+
=75%,
+
+
=
,得出
=
-75%,据此解答即可.
1 |
a |
1 |
b |
1 |
a |
1 |
b |
1 |
c |
5 |
6 |
1 |
c |
5 |
6 |
解答:解:因为
+
=75%,
+
+
=
,
所以
=
-75%=
-
=
,
所以c=12.
故答案为:12.
1 |
a |
1 |
b |
1 |
a |
1 |
b |
1 |
c |
5 |
6 |
所以
1 |
c |
5 |
6 |
5 |
6 |
3 |
4 |
1 |
12 |
所以c=12.
故答案为:12.
点评:解决此题的关键是根据
+
=75%、
+
+
=
得出
的值,进而求出c的值.
1 |
a |
1 |
b |
1 |
a |
1 |
b |
1 |
c |
5 |
6 |
1 |
c |
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