Question

Suma a trei numere este 3.600. Daca din fiecare se scade acelasi numar,se obtine numerele : 1.120;1.130 si 1.140. Calculati numerele initiale .

Answer 1

a+b+c=3600
a-x=1120, a=1120+x
b-x=1130, b=1130+x
c-x=1140, c=1140+x

inlocuim im prima relatie

1120+x+1130+x+1140+x=3600
3x+3390=3600
3x=3600-3390=210
x=21/3
x=70
a=1120+70=1190
b=1130+70=1200
c=1140+70=1210