## Algebra 1

$\frac{3}{7}$ = $\frac{9}{x}$ First, use the Cross Products Property. 3x = 7(9) Simplify the right side of the equation. 3x = 63 To find x, divide both sides of the equation by 3. $\frac{3x}{3}$ = $\frac{63}{3}$ x = 21