Question

Se considera proportia a supra 10 = 2 supra b  , A) Calculati a ori b - 20 : 4  , B) Aflati a , stiind ca b =40

Answer 1

a/10=2/b⇒ab=20
a*b-20:4=20-20:4=20-5=15
Daca b=40
a*40=20⇒a=20/40⇒a=2/4=1/2=0.5

Answer 2

$\frac{a}{10}$=$\frac{2}{b}$⇒a·b=2·10⇒a·b=20-20:4⇒20-5=15
b=40⇒a=$\frac{2*10}{40}$⇒a=$\frac{20}{40}$⇒a=$\frac{1}{2}$