Question

Determinati numerele naturale pozitive a,b,c siind ca:
a supra 3=b supra 5=c supra 7
si 2a+b-c=36
va rog am nevoie de ajutorrrrrr!!
DAU COROANA!!!

Answer 1

$\frac{a}{3} = \frac{b}{5} = \frac{c}{7} = k$
$\frac{a}{3} = k = > a = 3k$
$\frac{b}{5} = k = > b = 5k$
$\frac{c}{7} = k = > c = 7k$
2×3k+5k- 7k=36
6k+3k-7k=36
2k=36
k=18
a=3×18=54
b=5×18=90
c=7×18=125