a+b =26 a-b=12
dau coroana e urgent plz plz plz


Răspuns :

a+b=26
a-b=12 .....a=12+b

inlocuim....
12+b+b=26
12+2b=26
2b=26-12
2b=14
b=14:2
b=7

a+7=26
a=26-7
a=19

Coroana?
a=26-b
26-b-b=12
2b=26-12
b=14:2
b=7


a=26-7
a=19