## Thinking Mathematically (6th Edition)

Translation to algebraic expression (not simplified): $5x-2x$ Simplified form: $3x$
Let $x$ = the unknown number The product of five and a number: $5x$ Twice the number: $2x$ The difference between the product of five and a number and twice the number: $5x - 2x$ Simplifying gives: $=x(5-2) \\=x(3) \\=3x$