Răspuns :
a+b=36
a-b=12 => a=b+12
a=?
b=?
b+12+b=36
2b+12=36
2b=36-12
2b=24
b=24:2
b=12
a=12+12
a=24
Proba :
24+12=36
24-12=12
a-b=12 => a=b+12
a=?
b=?
b+12+b=36
2b+12=36
2b=36-12
2b=24
b=24:2
b=12
a=12+12
a=24
Proba :
24+12=36
24-12=12
E cu segmente. 36-12=24 24÷2=12esteb iar a este 12+12=24