8+11=19. For an example: If I already have 8 pigs at the animal farm, and one of my friends brings 11 more pigs, I will have a total of 19 pigs because 9 pigs plus 11 more pigs equals 19 pigs altogether at the animal farm.
M will represent Matt and J is Jackson. M-2.25=J. You minus the difference between them and show that it equals to Jacksons. A variable is a number in math that can vary.
