To solve equations of the form ax + b = c where a is an integer. Solutions are integers

There is no equal sign in this question, however, if the 73 is supposed to be on the other side of the equals, then

-27 + 20w = 73

20w - 27 + 27 = 73 +27 (add 27 to both sides)

20W = 100

W = 50