a) (c+78)-(48+d) = (1373+78)-(48+1073) = 1451 - 1121 = 330.
б) 529-(x-329) = 529 - (498-329) = 529 - 169 = 360.
a) (c+78)-(48+d) = (1373+78)-(48+1073) = 1451 - 1121 = 330.
б) 529-(x-329) = 529 - (498-329) = 529 - 169 = 360.