Using elimination to solve the system 2x + y = 8 and x + y = 4, which of the following could be the first step?
(Points : 2)

2x + y = 8-------- 2x + y = 8
(x + y = 4)(-1)--- -x - y = -4

2x + (4 - x) = 8

2x + y = x + y

3x + 2y = 12

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?
(Points : 2)
      
2x + y = 8--------> 2x + y = 8
(x + y = 4)(-1)---> -x - y = -4

      
2x + (4 - x) = 8

      
2x + y = x + y

      
3x + 2y = 12

      
x = 4

jdoe0001 · Answer

is it just me or you have the answer already?

anonymous · Answer

its what step is next that is correct

anonymous · Answer

the first one?

jdoe0001 · Answer

I see nothing wrong in the procedure sequence :|

anonymous · Answer

jdoe. u have to figure out the next step....

jdoe0001 · Answer

ahemm, I guess I didn't get it firstly :|, well, multiplying by (-1) on the second equation pretty much solves it