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2014-06-04T14:29:22+03:00
(525:5+b):5+12=790
(405+b):5=790-12
(405+b):5=778
405+b=778x5
405+b=3890
b=3890-405
b=3485

 (65 x502:10 - c-63):3=600  
(32630:10-c-63):3=600
3263-c-60=600x3
3203-c=1800
c=3203-1800
c=1403
4 3 4
2014-06-04T14:31:40+03:00
(525:5+b):5+12=790
(105+b):5=778
105+b=778*5
105+b=3890
b=3785
2) 65*502:10=3263
3263-c-63=600*3
3200-c=1800
c=1400
2 3 2