On sunday, a local hamburger shop sold a combined total of 267 hamburgers and cheeseburgers. the number of cheeseburgers sold was two times the number of hamburgers sold. how many hamburgers were sold on sunday

To do this I'm going to set up an equation. We don't know how many hamburgers were sold so we will call it x. The number of cheeseburgers sold was two times the number of hamburgers sold so we are going to call the number of cheeseburgers 2x. These add up to 267 so we can make and solve the equation:

x+2x=267

3x=267

x=89

89 hamburgers and 178 cheeseburgers were sold.

step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.