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dacă: 8a-7b/2a=9/7, aflati a/b​

Răspuns :

[tex] \frac{8a - 7b}{2a} = \frac{9}{7} [/tex]

9•2a=7(8a-7b)

18a=56a-49b

49b=56a-18a

49b=38a

[tex] \frac{a}{b} = \frac{49}{38} [/tex]