# Chapter 1 - Tools of Geometry - 1-2 Points, Lines, and Planes - Practice and Problem-Solving Exercises: 73

$\frac{3}{7}$

#### Work Step by Step

Simplify by eliminating common factors from each side of the ratio. $\frac{15x}{35x}=\frac{3\times/\!\!5\times /\!\!x}{7\times/\!\!5\times /\!\!x}=\frac{3}{7}$

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