Y=-6-x is not equal to 2x+y=12. Both sides were not divided by two when it was simplified.
An expression that is equivalent to the statement Subtract a from the quotient of 6 and B is 6/b - a
<h3>How to write equivalent expression</h3>
Given statement
Subtract a from the quotient of 6 and B
- The quotient of 6 and B can be written as 6/B
- a subtracted from 6/B is written as
6/B - a
Therefore, the correct option equivalent to the statement is option A) 6/B - a
Learn more about equivalent expression:
brainly.com/question/2972832
Differentiate both sides wrt 
:
By the chain rule, we get
Solve for 
:
