\(x+2x+3x+...+100x=2200\)
=>\(x\left(1+2+3+...+100\right)=2200\)
=>\(x.\frac{100.101}{2}=2200\)
=>\(x.5050=2200\)
=>x=2200:5050
=>x=\(\frac{44}{101}\)
\(x+2x+3x+...+100x=220\)
\(\Rightarrow x\left(1+2+3+....+100\right)=2200\)
\(\Rightarrow5050x=2200\)
\(\Rightarrow x=\frac{44}{101}\)
\(x+2x+3x+...+100x=2200\)
\(\Rightarrow x\left(1+2+3+...+100\right)=2200\)
\(\Rightarrow x.5050=2200\)
\(\Rightarrow x=\frac{2200}{5050}=\frac{44}{101}\)
Vậy \(x=\frac{44}{101}\)