Write an equation and solve it for each case below. let x be variable. x represents an integer.
a. a number added to -4 equals -1.
b. a number subtracted from 5 gives an answer of -2.
c. -7 minus a number equals -10.

Jessica is organizing a guided tour of the rain forest. the average profit per person that the touring company makes is given by the rational expression 18x+35/x, where x is the number of people going on the tour. what does the numerator of this rational expression represents?