Question

Adunand 1 supra 25 la o treime din dublul unui numar, obtinem o patrime din diferenta numerelor 1supra2 si 1supra3.Afla numarul.

Answer 1

Notam numarul cu x
1/25+ (1/3)*2x=(1/4)*(1/2-1/3)
(1/25)+(2*x/3)=(1/4)*(3/6-2/6)
(3+50*x)/75=(1/4)*(1/6)=1/24
(3+50*x)*24=75
72+1200*x=75
1200*x=3
x=3/1200=1/400
x=1/400