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Osmansergin
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[(a + 270:4)•5+100]:600=1

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123oana
[(a+270:4)×5+100]:600=1
(a+270:4)×5+100=600×1
(a+270:4)×5+100=600
(a+270:4)×5=600-100
(a+270:4)×5=500
a+270:4=500:5
a+270:4=100
a+270=100×4
a+270=400
a=400-270
a=130
Capsunica35
[(a+270:4)*5+100]:600=1
[(a+67,5)5+100]600=1
[5a+337,5+100]:600=1
[5a+437,5]:600=1
5a+437,5=600*1
5a=600-437,5
a=162,5/5
a=32,5

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