\(\left(2+x\right)+\left(4+x\right)+\left(6+x\right)+...+\left(100+x\right)=5000\)
\(\Leftrightarrow\left(x+x+x+...+x\right)+\left(2+4+6+...+100\right)=5000\)
\(\Leftrightarrow50x+2550=5000\)
\(\Leftrightarrow50x=2450\)
\(\Leftrightarrow x=49\)
Vậy x = 49