Question

suma a 3 nr,este 975.Daca din fiecare nr.se scade acelasi nr. se obtin nr.12,345 si 126.care sunt cele 3 nr?

Answer 1

$a+b+c=975 \\ \\ a-x=12 =>a=12+x \\ \\ b-x=345=>b=345+x \\ \\ c-x=126=>c=126+x \\ \\ 12+x+345+x+126+x=975 \\ 3x+483=975 \\ 3x=492 \\ \\ \boxed{x=164} \\ \\ a=12+164 \\ a=176 \\ \\ b=345+164 \\ b=509 \\ \\ c=126+164 \\ c=290$