a+b+c+d = 2412
(a-250) ; (b-412); (c-158); (d-314)
n+ n+1+n+2+ n+3 = 4n+6 = a-250+b-412 +c - 158 +d - 314 = (a+b+c+d) - 1134
4n+6 = 2412 - 1134 = 1278
4n = 1272 n = 318 n+1 = 319 n+2 = 320 n+ 3 = 321
I. a- 250 = 318 a = 568
b - 412 = 319 b = 731
c - 158 = 320 c = 478
d - 314 = 321 d = 635
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a + b + c + d = 2412
a+b +c + d =