Răspuns :
a+b = 70
a = 4b + 10
4b + 10 + b = 70
5b = 60 b = 12 a = 58
a = 4b + 10
4b + 10 + b = 70
5b = 60 b = 12 a = 58
a+b=70
a:b=4 rest 10 => a= 4b+10
4b+10+b=70 <=> 5b+10=70 <=> 5b=60 <=> b=12
a+12=70 <=>a=58