Variables are lvalues and so may appear on the left-hand side of an assignment. Numeric literals are rvalues and so may not be assigned. Given the variables:
College planning requires expertise in all four areas, and an acquired level of insight to master the complexity, see which variables are in play for a given family, and distill the options, tactics and best interest of the family into an overall strategy that people can understand and implement.
Now you've got 50 or so minutes of onion cookery ahead of you, and given all the eccentricities of pans and heat sources and thevariables of moisture in the onions, etc.