4 x = 20 - 3 x + y = - 7 The solution to the given system of equations

Question

4 x = 20 - 3 x + y = - 7 The solution to the given system of equations is x , y . What is the value of x + y ?

Accepted Answer

Choice C is correct. It's given that 4 x = 20 and - 3 x + y = - 7 is a system of equations with a solution x , y . Adding the second equation in the given system to the first equation yields 4 x + ( - 3 x + y ) = 20 + - 7 , which is equivalent to x + y = 13 . Thus, the value of x + y is 13 . Choice A is incorrect. This represents the value of - 2 x + y - 1 . Choice B is incorrect. This represents the value of - x + y . Choice D is incorrect. This represents the value of 2 x + y + 1 .

Question 4-x-20