Plz, help I will give brainiest to the correct answer!

A is correct.

Step-by-step explanation:

---> red tone

> gray tone

> brown tone

Step by Step:

Let

x> the number of ounces of red tone

y> the number of ounces  of gray tone

z---> the number of ounces of brown tone

we know that

> equation A

> equation B

> equation C

> equation D

substitute equation D and equation equation C in equation A

solve for z

> brown tone

Find the value of x

>  ---> red tone

Find the value of y

--->  > gray tone

5

step-by-step explanation:

i just took the test, the correct answer is .. 31.5 in.