(7а+b) / (11a-b) =2
(7а+b)=2*(11a-b)
7a+b=22a-2b
15a=3b
5a=b
a/4b = a/4*5a = 1/20
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(7а+b) / (11a-b) =2
(7а+b)=2*(11a-b)
7a+b=22a-2b
15a=3b
5a=b
a/4b = a/4*5a = 1/20