已知3+11+18+13x=2012517,则x=______.-数学

题目简介

已知3+11+18+13x=2012517,则x=______.-数学

题目详情

已知3+
1
1+
1
8+
13
x
=
2012
517
,则x=______.
题型:填空题难度:偏易来源:不详

答案

3+class="stub"1
1+class="stub"1
8+class="stub"13
x

=3+class="stub"1
1+class="stub"1
class="stub"8x+13
x

=3+class="stub"1
1+class="stub"x
8x+13

=3+class="stub"1
class="stub"9x+13
8x+13

=3+class="stub"8x+13
9x+13


所以,3+class="stub"8x+13
9x+13
=class="stub"2012
517

class="stub"8x+13
9x+13
=class="stub"2012
517
-3,
class="stub"8x+13
9x+13
=class="stub"461
517

4136x+517×13=4149x+461×13,
         13x=(517-461)×13,
           x=56.
故答案为:56.

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