1) Find the value of x.
RKN = 640
a) 7
c) 9
b) 8
d) 32
???? ASAP

Answer:
c) 9
Step-by-step explanation:
4x - 2 + 30 = 64
4x + 28 = 64
4x = 64 - 28
4x = 36
x = 36/4
x = 9