Question

Suma a 2 nr=70
1 nr =2 supra 3 din 2
Nr=?

Answer 1

a+b=70
b=2/3*2
=> a+2/3*2=70
=> a = 70 - 2/3*2 = 70 - 4/3 = (70*3 - 4)/3 = (210-4)/3 = 206/3
Verificam:
206/3 + 2/3*2 = 70 ??
(206+4)/3 = 210/3 = 70, deci am rezolvat corect

Answer 2

a+b=70
a=2/3 din b
Grafic avem
a l----l----l      } suma =70
b l----l----l----l
70:5=14 (1/3)
2x14=28 (a)
3x14=42 (b)
verific 28+42=70