Question

Sa se afle numere le a,b,c stiind ca a+b+c=430;a:b=2;b:c=3

Answer 1

a+b+c=430

a:b=2 => a=2b

b:c=3 => b=3c

Daca a=2b si b=3c, atunci a=2*6c=6c.

a+b+c=430

6c+3c+c=430

10c=430

c=43

a=6*c=6*43=258

b=3*c=3*43=129

Answer 2

a + b + c = 430

a : b = 2 ⇒  a = 2 x b = 2 x 3 x c = 6 x c

b : c = 3 ⇒ b = 3 x c

_______________________________

6 x c + 3 x c + c = 430

10 x c = 430

c = 430 : 10

c = 43

a = 6 x 43 = 258

b = 3 x 43 = 129

Verific:  258 + 129 + 43 = 430 → suma celor 3 numere