题目内容
甲数是乙数的
,甲数增加
,乙数增加
,则乙数是甲数的
,则甲数是 .
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| 3 |
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| 7 |
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| 7 |
| 2 |
分析:设乙数是x,那么甲数就是
x,依据题意可列方程:x+
=(
x+
)×
,依据等式的性质即可解答.
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| 3 |
| 7 |
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| 1 |
| 3 |
| 1 |
| 3 |
| 7 |
| 2 |
解答:解:设乙数是x,
x+
=(
x+
)×
,
x+
=
x+
,
x+
-
=
x+
-
,
x+
-x=
x-x,
÷
=
x÷
,
x=7,
×7=2
.
故答案为:2
.
x+
| 7 |
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| 3 |
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| 3 |
| 7 |
| 2 |
x+
| 7 |
| 3 |
| 7 |
| 6 |
| 7 |
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x+
| 7 |
| 3 |
| 7 |
| 6 |
| 7 |
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| 7 |
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| 7 |
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x+
| 7 |
| 6 |
| 7 |
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| 7 |
| 6 |
| 1 |
| 6 |
| 1 |
| 6 |
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| 6 |
x=7,
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| 3 |
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| 3 |
故答案为:2
| 1 |
| 3 |
点评:依据数量间的等量关系列方程,并依据等式的性质解方程是本题考查知识点.
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