Question

Determinati nr x,y,z stiind ca

A) x supra 2 = y supra 11 = z supra 7 si x+y+z =80

Answer 1

x supra 2=y supra 11=z supra 7=k
x=2k
y=11k
z=7k
Deci inlocuim in suma 2k+11k+7k=80 => 20k=80 => k=80:20 => k=4
x=2x4=8
y= 11x4=44
z= 7x4=28