Algebra 2 Common Core

$\dfrac{8}{3}$
Distribute 5 to have $15w-10-7=23 \\15w-17=23$. Add $17$ to both sides to have $15w=23+17 \\15w=40$. Divide both sides by 15 to have $w=\frac{40}{15} \\w=\frac{8}{3}.$