9) (a+b+c):3=28 => a+b+c=28x3 =>a+b+c=84
(a+b):2=35 => a+b=35x2 => a+b=70
70+c=84
c=84-70 => c=14
10) (a+b):2=41,1 => a+b=41,1x2 => a+b=82,2
a-b=32,4 => a=32,4+b
32,4+b+b=82,2
32,4+2b=82,2
2b=82,2-32,4
2b=49,8
b=49,8:2 => b=24,9
a=32,4+24,9 => a=57,3
11) (a+b+c):3=37,(3)
a+b+c=37,(3)x3
a+b+c=111,(9)
(b+c):2=54 => b+c=54x2 => b+c=108
c=b+44
b+b+44=108
2b=108-44
2b=64 => b=64:2 => b=32
c=32+44 => c=76
a+32+76=111,(9)
a+108=111,(9)
a=108-111,(9)
a=3,(9)