A
B
C
D
Explanation
Correct answer: C.
Choice C is correct. Subtracting from both sides of the given equation yields , which is the equation given in choice C. Since this equation is equivalent to the given equation, it has the same solution as the given equation.
Desmos solution:
Note: Enter the relationship as a regression; Desmos prints the unknown as 3, then the next expression evaluates to 12.
Enter in Desmos:
Reviewed and rewritten by CookSAT
Why the other choices are wrong
Choice A
Choice A is incorrect and may result from conceptual or calculation errors.
Choice B
Choice B is incorrect and may result from conceptual or calculation errors.
Choice D
Choice D is incorrect and may result from conceptual or calculation errors.