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3b/2a+3b=15/19
a/b=?


Răspuns :

3b/2a+3b=15/19 => (3b+6ab)/2a=15/19

30a= 19(3b+ 6ab)= 57b+ 114ab= 57b * 2a

30a= 57b * 2a => 15a= 57b => a/b= 15/ 57