Please help with this

Answer:
x=5, B
Step-by-step explanation:
You just need to put it under a ratio, where 8/20=10/5x
if you cross-multiply, you get that 40x=200, x=5
Answer:
B) 5
Step-by-step explanation:
Solve by ratios.
10/5x = 8/20
Cross multiply.
5x × 8 = 20 × 10
40x = 200
Divide both sides by 40.
(40x)/40 = 200/40
x = 5