Question

x+2x+3x+.......+10x=110

 

Answer 1

x(1+2+3+4+5+6+7+8+9+10)=110

55x=110

x=110/55

x=2

Answer 2

\(x+2x+3x+...+10x=110\)

\(x\left(1+2+3+...+10\right)=110\)

\(x.55=110\)

\(x=110\div55\)

\(x=2\)