Question

An adult meal at a restaurant costs ine dollar less than twice the cost of c,a childrens's meal.Which equation can be used to find a,the cost of an adult meal?

Answer 1

To solve this word problem, we need to translate words into math. We know there's an equation in here, so we first find the equals sign - that's what "costs" means in the first sentence.

So an adult meal "costs" - already we have\[a = ?\] (a being the adult meal). What does a equal? To find that, we find what the adult meal costs: "one dollar less than twice the cost of c."

It's easy to see there's a 2c here (from "twice the cost of c") - what else is on this side of the equation? A "dollar less"; that's -1. Adding the 2c and -1 together we have:\[= 2c - 1\]That's our equation!\[a = 2c -1\]

Answer 2

You'll probably want to post any future algebra questions in the Mathematics group; that's their domain ;-)