Step-by-step explanation:
all the details are in the attachment.
Answer:
I'm pretty sure that it's C.
X = 100
X + 20 over 4 = 30
1/4x + 5 = 30
-5 -5
1/4x = 25
multiply both sides by 4
x = 100
700
100:2
???:14
14*100
=1400
1400/2
=700