Answer:
A. The student solved the equation correctly.
Step-by-step explanation:
We have been given a student's work to solve the equation . We are asked to chose accurate interpretation of the student's work.
Step 1: Multiply both sides by (x-4).
Step 2: Multiply both sides by 7.
Step 3: Distribute x on right ride.
Step 4: Subtract 21 from both sides.
Step 5: Factor by splitting the middle term.
Step 6: Use zero product property.
Since student's work is correct, therefore, option A is the correct choice.