170+а = 869
a=869-170
a=699
с - 841=108
c=108+841
c=949
170+а = 869 a=869-170 a=699
с - 841=108 c=108+841 c=949
170+а = 869
a=869-170
a=699
с - 841=108
c=108+841
c=949
170+а = 869 a=869-170 a=699
с - 841=108 c=108+841 c=949