Evaluating Expressions - One Step

x + 5, x = 4

m - 10, when m = 16

y + 4 when y = 20

15 + c, when c = 20

50 - b, when b = 30

2m, when m=4

5v, when v=3

20/b when b=4

the sum of 4 and f, when f=6

the product of 5 and z, when z=10