Algebra 1: Common Core (15th Edition)

Tree 1: 3 + 1x Tree 2: 4 + 1/2x Next, we make the equations equal to each other: $3 + 1x = 4 + 1/2x$ Subtract 1/2x and 3 from both sides; $1/2x = 1$ Divide both sides by 1/2; $x=2$