## Algebra 1

$0.8(200-y)\longrightarrow$ multiply using the distributive property =$0.8(200)-0.8y\longrightarrow$ simplify =$160-0.8y$ Substitute the age for a 20 year old. $160-0.8(20)=160-16=144$ Substitute the age for a 50 year old. $160-0.8(50)=160-40=120$