Answer:
52: 8-Z
54: 18+X
60: 12.3
64: 2.5
52: 8 subtracted from z, the equation will only be 8-z because we do not know what z is.
54: 18 more than a number, we do not know what the number is so we will name it X, more than is adding, so the equation will look like this, 18+X
60: Since y is 6.7, all you have to do is subtract 19-6.7.
64: Since n is 7.5 just divide 7.5 from 3 and you will get 2.5.