Question

Numerele a si b sunt direct proportionale cu 2 si 5
a). Determinati p,astfel incat a=p%b
b).Daca 3a+b=44,atunci calculati valoarea numarului 5a-b

Answer 1

a/2=b/5=k
a/2=k⇒a=2k
b/5=k⇒b=5k
a)  a=p%b⇒2k=5kp/100⇒5kp=2k·100⇒p=200k:5k⇒p=40%
b)3a+b=44⇒3×2k+5k=44⇒6k+5k=44⇒11k=44⇒k=44:11⇒k=4
5a-b=?⇒5×2k-5k=
              10k-5k=5k⇒5a-b=5×4=20