Question

. Sa se afle produsul a trei numere, stiind că A+B=21, B+C=5 şi A+C=22.

Answer 1

a+b=21
b+c=5
a+c=22
________
2(a+b+c)=21+5+22
2(a+b+c)=48
a+b+c=48:2
a+b+c=24
________
=>c=24-21=3
=>a=24-5=19
=>b=24-22=2
________
3×19×2=114

Answer 2

! a+b=21 !
! b+c=5 !
! a+c=22 !

2×(a+b+c)=21+5+22
2×(a+b+c)=48
a+b+c= 24 (V:19+3+2=24)

1. c=?
24-21=3

2. a=?
24-5=19

3.b=?
24-22=2

Produsul:
=3×19×2=
=57×2=
=114

Succes! :)