5 x = 15 - 4 x + y = - 2 The solution to the given system of equations

Question

5 x = 15 - 4 x + y = - 2 The solution to the given system of equations is x , y . What is the value of x + y ?

Accepted Answer

Choice C is correct. Adding the second equation of the given system to the first equation yields 5 x + - 4 x + y = 15 + - 2 , which is equivalent to x + y = 13 . So the value of x + y is 13 . Choice A is incorrect and may result from conceptual or calculation errors. Choice B is incorrect. This is the value of - ( x + y ) . Choice D is incorrect and may result from conceptual or calculation errors.

Question 5-x-15