How to Do Equation Representing Situations


Hi, I'm Rachel, and today we're going to be going over how to do equations representing situations. Well in math we write equations for everything. It's literally putting the sentence into a mathematical equation. So you want to look for terms like that mean things like sum, like more than for example. So let's look at an example like that. Sum is addition. So if we have a real life situation like Molly is five years older than Sally, then we know that Molly's age plus five that is she is five years older than Sally. So Molly is five years older so Sally is going to be younger. So we're actually going to have to add Sally's age plus five to get Molly's age because Molly's age is so much bigger. So this is an example of Sally's age plus five to get Molly's age and that's a mathematical equation and if you figure out say how much Sally is, maybe you know that Sally is eleven years old and you want to know how old Molly is. Well you are just going to then plug in the numbers to this equation. So we know that Sally is eleven, we know that Molly is five years older so that's going to be eleven plus five to get sixteen so that gives us Molly is going to be sixteen years old. And that's an example of plugging this mathematical equation into a real life situation. I'm Rachel and thank you for learning with me today.

Rachel Kaplove has worked as a professional private tutor since 2005. Specializing in Math and Science, she tutors students from the second grade level to advanced high school honors levels.