Question

Determinati numerele a,b,c, stiind ca sunt invers proportionale cu 1 supra 5, 1 supta 4 si 1 si a-2c=0,3

Answer 1

a*1/5=b*1/4=c*1
a - 2a/5=3/10
10a - 4a = 3
6a = 3
a=1/2
c=1/2*1/5=1/10
b=4c=4/10=2/5
Verificare:
1/10 = 2/5 * 1/4 = 1/10 = 1/10 OK