## Introductory Algebra for College Students (7th Edition)

$\frac{x}{7}$ + $\frac{x}{8}$ = 12
The sum of $\frac{1}{7}$ of a number and $\frac{1}{8}$ of that number gives 12. let the number be x " $\frac{1}{7}$ of a number" = $\frac{1}{7}$x = $\frac{x}{7}$ "$\frac{1}{8}$ of that number" = $\frac{1}{8}$x = $\frac{x}{8}$ The sum of $\frac{1}{7}$ of a number and $\frac{1}{8}$ of that number = $\frac{1}{7}$x + $\frac{1}{8}$x On the right hand side we have 12 $\frac{x}{7}$ + $\frac{x}{8}$ = 12