What is an equation to represent -12 less than a number is 20?

x+12=20

Step-by-step explanation:

"A number" is referring to x and when you subtract a negative number you are actually adding.This equals 20 so you right it as x+12=20

true? is that what you're asking or do you mean something else?

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart