Question

A+b=14 B+C=17 A+C=27 ABC=??

Answer 1

a+b    =14
    b+c=17
a+    c=27

Le adunam:

2(a+b+c)=14+17+27

a+b+c=58/2

a+b+c=29

In relatia a+b+c=29, inlocuim a+b=14, rezulta c=15

In relatia a+b+c=29, inlocuim b+c=17, rezulta a=12

In relatia a+b+c=29, inlocuim a+c=27, rezulta b=2

Answer 2

A+B=14
B+C=17
A+C=27
A+B+B+C+A+C=14+17+27
2*(A+B+C)=58
A+B+C=58:2
A+B+C=29
14+C=29
C=29-14
C=15
B+15=17
B=17-15
B=2
A+2=14
A=14-2
A=12