## Geometry: Common Core (15th Edition)

Start with the given equation. $2(x+4)=x+13$ Apply the distributive property. $2x+8=x+13$ Subtract x from each side and simplify. $2x+8-x=x+13-x$ $x+8=13$ Subtract 8 from each side and simplify. $x+8-8=13-8$ $x=5$