tentukan nilai bilangan dalam persamaan berikut

a.
5v = 20
v = 20/5
v = 4

b.
a/5 = 4
a = 4 × 5
a = 20

c.
7z = 49
z = 49/7
z = 7

d.
n/5 = 3
n = 3 × 5
n = 15