Express $\frac{16}{x\times 3}\times 25$ as a single fraction.
$$\frac{16\times 25}{x\times 3}+\frac{3}{x}$$
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of $x\times 3$ and $x$ is $3x$. Multiply $\frac{3}{x}$ times $\frac{3}{3}$.
$$\frac{16\times 25}{3x}+\frac{3\times 3}{3x}$$
Since $\frac{16\times 25}{3x}$ and $\frac{3\times 3}{3x}$ have the same denominator, add them by adding their numerators.
$$\frac{16\times 25+3\times 3}{3x}$$
Do the multiplications in $16\times 25+3\times 3$.
