Question

Suma a trei nr. e 100.Daca din fiecare se scade acelasi nr.,se obtin numerele 11,29,30.
Care sunt numerele?

Answer 1

a+b+c=100
a-x=11=> a=x+11
b-x=29 => b=29+x
c-x=30 => c=x+30

x+11+29+x+x+30=100
3x+70=100
3x=30
x=10

a=10+11=21
b=29+10=39
c=30+10=40

Answer 2

$11+29+30=70 \\ 100-70=30 \\ 30:3=10 \\ 10+11=21 \\ 10+29=39 \\ 10+30=40$