You are in charge of drinks for a community barbecue. You need to supply at least 120 cups of beverage to provide enough for the
projected number of people that will attend. So far, you have received the following donations: Enough mix to make 5 gallons of lemonade
6 bottles of fruit juice that each contain 64 fl. oz.
How many cups of beverage do you have?
So we have three numbers x x+12 (a number 12 more than our original one) x-12 ( a number 12 less than our original one) the sum of all these numbers was 15, thereful: x+x+12+x-12=15 3x=15 x=5 mikes original number is 5