Question

Suma a 3 numere este 240.Daca din fiecare numar  se scade acelasi numar ,se obtin  numerele 25,26  si 120.Aflati cele 3 numere.

Answer 1

a+b+c=240
a-x=25⇒a=25+x
b-x=26⇒b=26+x
c-x=120⇒c=120+x

a+b+c=240
(25+x)+(26+x)+(120+x)=240
3x+171=240
3x=240-171
3x=69
x=69:3
x=23⇒a=25+x=25+23=48  
a=48
x=23⇒b=26+x=26+23=49
b=49
x=23⇒c=120+x=120+23=143
c=143

verificare a+b+c=48+49+143=94+143=240