Math Problem Solver

\[ 19 + 3 - \frac{28}{7} = 18 \]

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of \(\frac{19}{1}\), \(\frac{3}{1}\), and \(\frac{-28}{7}\) is \(7\). \[ \begin{aligned} 19 + 3 - \frac{28}{7} &= \frac{19 \cdot 7}{1 \cdot 7} + \frac{3 \cdot 7}{1 \cdot 7} + \frac{-28 \cdot 1}{7 \cdot 1} \\ &= \frac{133 + 21 + -28}{7} \\ &= \frac{126}{7} \\&= 18 \end{aligned} \]