Answer:
b=a+4
Step-by-step explanation:
(I'm not too sure though)
b = a + 4
I just plugged in a to the equation. Heres my work:
b = 4 + 4 , b = 8
b = 8 + 4, b = 12
b = 12 + 4, b = 16
b = 16 + 4, b = 20
