Question

Am neboie urgent!Va rog!!Dau coroana!​

Answer 1

$\frac{a}{\frac{1}{2}}=\frac{b}{\frac{1}{3}}=\frac{c}{\frac{1}{5}}=k$  
⇒ $a=\frac{k}{2}$
$b=\frac{k}{3}$
$c=\frac{k}{5}$
$a+b=\frac{k}{2}+\frac{k}{3}=\frac{3k}{6}+\frac{2k}{6}=\frac{5k}{6}$

$\frac{x}{100}\times (a+b)=c$
⇒ $\frac{x}{100}=\frac{c}{a+b}=\frac{\frac{k}{5}}{\frac{5k}{6}}=\frac{k}{5}\times \frac{6}{5k}=\frac{6}{25}$
⇒ $x=\frac{100\times 6}{25}=\frac{600}{25}=24$

Deci procentul este 24.