9 is 12% of 75 check it 9* 100 = 900 / 75 = 12
Yes it is equivalent because you need to isolate the y so divide by 5 on both sides and 23 divided by 5 is 4.6
8 divided by 4 = 2
So two is your answer
Answer:

Step-by-step explanation:
Given: 
To solve for y, let us first isolate y on one side of the equation. We can do this by subtracting
from the left and move it to the right. We then get:

Now, we have y isolated. We now have to remove the 4 from the y. The only way to do this is divide both sides by 4. We then get our final answer:

We can clean this up by putting it in a common form, slope-intercept form:

old weight - decrease = new weight
decrease = weight * percent
decrease = 72 * .125 = 9 lbs
old weight - decrease = new weight
72 - 9 = new weight
63 lbs
A healthy weight for the dog is 63 lbs