Zoe is decorating a cake for her grandpa's birthday and needs to know how many more candles to add. Follow along as she explains how to set up and solve algebraic equations in this step-by-step presentation. Equations with negative numbers and variables are included, so be sure young mathematicians are familiar with adding and subtracting integers before presenting this resource. Complete with guided practice problems and a brief formative assessment, this would make a great in-class or homework assignment following a lesson on addition and subtraction equations.