Question

Aflati numerele a,b,c stiind ca:a+b=c;
a-b=b
b+c=32

Answer 1

a+b=c
a-b=b
b+c=32
32+32-32=64-32=32

Answer 2

a+b=c⇒a=c-b
a-b=b=a=b+b=2b
Egalam:
2b=c-b⇒2b+b=c⇒3b=c Inlocuim:
b+c=32
b+3b=32
4b=32⇒b=32:4
            b=8⇒c=3×8=24⇒a=24-8=16