Question

Stiind ca a/b=2/7 calculati valoarea raportului (5a+b)/(3b-2a)

Answer 1

Răspuns:

a/b=2/7=>a=2b/7

inlocuim pe a in relatia ceruta

(5·2b/7+b)/(3b-2·2b/7)=

(10b/7+⁷⁾b)/(⁷⁾3b-4b/7)=

(10b+7b)/(21b-4b)=

17b/17b=1

Answer 2

Bună,:)

$\frac{5a + b}{3b - 2a} = \frac{5 \times 2k + 7k}{3 \times 7k - 2 \times 2k} = \frac{17k}{?17k} = 1$

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