Question

aflati nr.naturale abc,care verifica egalitatile:a+b=28;b+c=16;c+a=20​

Answer 1

Răspuns:

a+b=28

b+c=16

c+a=20  

a+b+b+c+c+a=28+16+20

2a+2b+2c=64=>2(a+b+c)=64 => a+b+c=64:2=>a+b+c=32

a+b+c=32

28+c=32

c=32-28=>c=4

a+16=32

a=32-16=>a=16

20+b=32=>b=12