Math Problem Solver

\[ 7.5 + 7.5 = 15 \]

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of \(\frac{7}{1}\), \(\frac{5}{10}\), \(\frac{7}{1}\), and \(\frac{5}{10}\) is \(10\). \[ \begin{aligned} 7.5 + 7.5 &= \frac{7 \cdot 10}{1 \cdot 10} + \frac{5 \cdot 1}{10 \cdot 1} + \frac{7 \cdot 10}{1 \cdot 10} + \frac{5 \cdot 1}{10 \cdot 1} \\ &= \frac{70 + 5 + 70 + 5}{10} \\ &= \frac{150}{10} \\&= 15 \end{aligned} \]