(x+1) + (x+2) + .... + (x+100) = 5750
\(\Rightarrow\) x + 1+ x + 2 + .... + x + 100 = 5750
\(\Rightarrow\) (x + x +...+ x) + (1 + 2 + .... + 100) = 5750
\(\Rightarrow\) 100x + 5050 = 5750
\(\Rightarrow\) 100x = 5750 - 5050
\(\Rightarrow\) 100x = 200
\(\Rightarrow\) x = 200 \(\div\) 100
\(\Rightarrow\) x = 2
Vậy x = 2