Can someone please help me i don’t know what to do on this

Answer:
4/5
Step-by-step explanation:
y is 5 times as big as x
When y is 4, divide it by 5 to find x
x = 4/5
Answer:
I would say 20 or 30
Step-by-step explanation:
if y=15 and x=3 and than x=4 than y would be 20 or 30