40-(x*20)=7 solve for x to find out how many students are in the class
40-(x*20)=7 This is NOT an inequality but an equation!.
40 - 20x = 7
-20x = 7 - 40
-20x = -33 divide both sides by -20
x = -33/-20
x= 3 + 13/20 =3 13/20
