Question

4
If x = 18+473, then x
-
is equal to​

Answer 1

Answer:

x= 18 + 473

x = 491

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Answer 2

It is an arithmetic series.

a = -4    d = +3

-4  - 1  + 2  + 5 + .... + (x-3) + x = 437

Sum of the series = [ 2 a + (n-1)d ]n /2 = 437 

                        [ - 8 + 3(n-1) ] n / 2  = 437

               - 11n + 3n² = 874

           3 n² -11n - 874 =    n =   (11 +- 103 )/6  =  114/6 = 19   as n is +ve only.

So x = a + (n-1)d = -4 + 3 (19-1) = 50