Question

Aflaţi numerele naturale a,b şi c care verifică simulant egalităţile:a+b=24,b+c=18,c+a=26​

Answer 1

Răspuns:

a+b =24

b+c =18

a+ c =26

___________

2a+2b+2c=24+18+26

2a+2b+2c=68

a+b+c=68÷2

a+b+c=34

24+c=34

c=34-24

c=10

b+10=18

b=18-10

b=8

a+8=24

a=24-8

a=16

a+b=16+8=24

b+c=8+10=18

a+c= 16+10=26