Question

(x+1)+(x+2)+..............+(x+100)=5750

Answer 1

( x +1 )+ ( x + 2 ) + ... +  ( x + 100 ) = 5750

( x + x + x + ...+ x ) + ( 1 + 2 + ... + 100 ) = 5750

x * 100 + 5050 = 5750

x * 100 = 700

x = 7