Question

Se considera proportia a/b=13/4 . Formand proportyy derivate determinati numerele a si b in fiecare din cazurile:
a) a+b=27
b)a+b=34

Answer 1

a) $\dfrac ab=\dfrac{13}{4}\Rightarrow\dfrac{a+b}{b}=\dfrac{13+4}{4}\Rightarrow\dfrac{27}{b}=\dfrac{17}{4}\Rightarrow b=\dfrac{4\cdot27}{17}=\dfrac{108}{17}$

Punctul b) este absolut la fel. Cred ca te descurci.