First, create an equation with the criteria given.
If we let x be your number,
\(2(3x) = 80 + x + 10\)
(\(2(3x)\) is twice the product of 3 and x, and if it exceeds \(x+80\) by 10, then we add 10 to \(x+80\) to make the two sides of the equation equal.)
Now, solve for \(x\).
\(6x=90+x \\ 5x=90 \\ x=18\)