Question

Dacă a + b = 30, b + c = 40 şi a + c = 38, atunci a = .....,b= ....., c = ....​

Answer 1

Răspuns:

a+b=30

b+c=40

a+c=38

2a+2b+2c=108

a+b+c=54

30+c=54

c=54-30=24

b+24=40

b=40-24=16

a+24=38

a=38-24=14

a=14

b=16

c=24