Help meeee! a+b=69 a:b=5 r3! helpppppp!!!

Răspuns :

a+b=69
a:b=5 rest 3                 a=5b+3

5b+3+b=69
6b+3=69
6b=66
b=66:6
b=11

a+11=69
a=69-11
a=58

proba: 58+11=69
58:11=5 rest 3