Using elimination to solve the system 2x + y = 8 and x + y = 4, which of the following could be the first step?
A. 2x + y = 8-------- 2x + y = 8
(x + y = 4)(-1)--- -x - y = -4
B.2x + (4 - x) = 8
C. 2x + y = x + y
D. 3x + 2y = 12
E.x = 4

Question

Using elimination to solve the system 2x + y = 8 and x + y = 4, which of the following could be the first step?
A.   2x + y = 8--------> 2x + y = 8
(x + y = 4)(-1)---> -x - y = -4 
 B.2x + (4 - x) = 8 
 C. 2x + y = x + y 
D. 3x + 2y = 12 
 E.x = 4

marissalovescats · Answer

Your first step would have something to do with getting rid of one of the variables. Does that make sense?

marissalovescats · Answer

So look at your answer choices. Which one alters a polynomial so that a variable cancels out?

lopus · Answer

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