Question

URGENT...! Vă rog....​

Answer 1

a + b + c = 502

b = 3 × a

c : b = 7 rest 2 ==> c = 7×b + 2

c = 7×3×a + 2 = 21×a + 2

inlocuim in prima relatie in functie de a

a + 3 × a + 21 × a + 2 = 502

25 × a = 502 - 2

25 × a = 500

a = 500 : 25

a = 20

b = 3 × 20 = 60

c = 21 × 20 + 2 = 422

Verificare:

20 + 60 + 422 = 502