The equation in standard form would be,

All you have to do is move -2/7x to the other side.
Hope this helped
:D
Answer:
9.07 and 7.77 respectively.
Step-by-step explanation:
To determine the upper control limit, add 0.65 lb to 8.42 lb, obtaining 9.07 lb.
To determine the lower one, subtract 0.65 lb from 8.42 lb, obtaining 7.77 lb.
Let the no. Of horses be x
9÷2 = 72÷x
X= 144÷9
No. Of horses = 16
You have to divide 1.25 by .25 the answer is 5 servings