## Precalculus (6th Edition) Blitzer

The value of x is $4$.
Consider the expression $5\left( 2x-3 \right)-4x=9$ and solve as follows: \begin{align} & 5\left( 2x-3 \right)-4x=9 \\ & 10x-15-4x+15=9+15 \\ & 6x=24 \\ & x=4 \end{align}