## Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

$4$
Adding 3 to both sides we have $$2x - 3 = 5\Longrightarrow 2x-3+3=5+3 \Longrightarrow 2x=8$$ Dividing both sides by $2$ gives $$x=4$$