## Geometry: Common Core (15th Edition)

$x=15$
We start with the given equation: $3x+8=53$ First, we subtract $8$ from both sides of the equation and simplify: $$3x-8+8=53-8$$$$3x=45$$ Next, we divide by $3$ on both sides of the equation: $$\frac{3x}{3}=\frac{45}{3}$$$$x=15$$