题目内容
(2012•江干区一模)己知3(x+
)-
=
,则10-x-
=
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9
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9
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分析:根据已知将(x+
)看作整体,进而求出其值,再代入10-x-
=10-(x+
)求出即可.
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解答:解:3(x+
)-
=
,
3(x+
)=1,
x+
=
,
故10-x-
=10-(x+
)=10-
=9
,
故答案为:9
.
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3(x+
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x+
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故10-x-
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故答案为:9
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点评:此题主要考查了解一元一次方程,根据已知得出x+
的值是解题关键.
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