Math Problem Solver

\[ 20 - \frac{18}{6} = 17 \]

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of \(\frac{20}{1}\) and \(\frac{-18}{6}\) is \(6\). \[ \begin{aligned} 20 - \frac{18}{6} &= \frac{20 \cdot 6}{1 \cdot 6} + \frac{-18 \cdot 1}{6 \cdot 1} \\ &= \frac{120 + -18}{6} \\ &= \frac{102}{6} \\&= 17 \end{aligned} \]