If the system of equations above has solution , what is the value of ?

Question

Accepted Answer

Choice C is correct. Adding the given equations yields 9 x + 9 y = 162. Dividing each side of the equation 9 x + 9 y = 162 by 9 gives x + y = 18. Choice A is incorrect and may result from incorrectly adding the equations. Choice B is incorrect and may result from conceptual or computational errors. Choice D is incorrect. This value is equivalent to y - x.

Question if-the