## Algebra 1

$z=3.75$
Start with the given equation: $5(2+4z)=85$ We use the distributive property to expand the left side of the equation: $10+20z=85$ We subtract $10$ from both sides of the equation: $20z=85-10$ We combine like terms: $20z=75$ We divide both sides of the equation by $20$: $z=\frac{75}{20}=3.75$