Chapter 1 - Section 1.4 - Basic Rules of Algebra - Exercise Set - Page 54: 70

$11x-5x,$ simplifies to $6x$

"the product of $5$ and a number" $\rightarrow 5x$ is subtracted from "the product of $11$ and a number" $\rightarrow 11x$ So, $5x$ is subtracted from $11x$:$ \quad 11x-5x$ Combine like terms by combining the coefficients of the terms and keeping the same variable factor. $11x-5x=\qquad 6x$