Question

determinati nr nat a b c stiind ca a+b=84,b+c=64 a+c=34​

Answer 1

Răspuns:

27, 57, 7

Explicație pas cu pas:

2a+2b+2c=84+64+34  ⇒ S=a+b+c=91

c=S-84=91-84=7

a=S-64=91-64=27

b=S-34=91-34=57

Answer 2

Răspuns:

a+b=84

b+c=64

a+c=34​

__________

a+b+b+c+a+c=84+64+34=>2a+2b+2c=182=>2(a+b+c)=182=>a+b+c=182:2=>

a+b+c=91

84+c=91=>c=91-84=>c=7

a+64=91=>a=91-64=>a=27

b+34=91=>b=91-34=>b=57