Răspuns :
a+b=102
a:b=2+12
a=2b+12
b+2b+12=102
3b+12=102
3b=90
b=30
a=30 x 2+12=60+12=72
a=72
a+b=102 ==>
a:b=2 rest 12 => a=b*2+12 => a=2b+12
==> 2b+12+b=102 ==> 3b=102-12 ==> 3b= 90 ==> b=90/3 ==> b=30
a+30=102
a=102-30
a=72