The answer is Letter b
If you subtracted 5 with 2 5/16 you will get answer
R = 5(CA - 0.3)
<span>Multiply everything in the parenthesis by 5.</span>
R = 5CA - 1.5
Add 1.5 to both sides
1.5 + R = 5CA
Divide 5A on both sides.
C = 1.5 + R / 5A
Hope this helps!
Look in ur textbook the back has all answers.