Answer:
4:7
Step-by-step explanation:
X actually equals 16 becaausw if yiu add 16+4 you get 20 and then you have to multiply 20 by 1 and you get 20 so x=16
equation- 4÷x=-7
x= -4/7
y=kx
5=10k
k=10-5
k=5 is the correct answer