Question

3a+2b supra a+7b=12 supra 23. Aflati valoarea raportului a supra b

Answer 1

(3a+2b)/(a+7b)=12/23⇒
23(3a+2b)=12(a+7b)
69a+46b=12a+84b
a(69-12)=b(84-46)
57a=38b
a/b=38/57
a/b=2/3

Answer 2

3a+2b)/ ( a+7b)=12/23
23(3a+2b)=12(a+7b)
69a+46b=12a+84b
57a=38b
a/b=38/57
simplific cu 19:
a/b=2/3