Question

Danny has at least $15 more than his big brother.Danny's big brother has $72.How much money does Danny have?Write an inequality to solve each problem

Answer 1

If Danny has AT LEAST $15 dollars more than his brother, and his brother has $72, then the equality would start out like this (where d = the amount of money Danny has):

$d\ge72+15$

Because he has AT LEAST $15 more; it could be exactly 15, or it could be any number more than 15.  So, to simplify:

$d\ge72+15\\d\ge87$

Danny has at least $87 ($87 or more).