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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

Mathematics
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x—2 equations combined: 2x + y - x - y = 8 - 4 x = 4 y—1st equation, substitute x with 4: 2(4) + y = 8 8 + y = 8 y = 0 Answer: x = 4, y = 0 Proof—2nd equation: 4 + 0 = 4 4 = 4....
So the answer is ?
Answer: x = 4, y = 0

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Other answers:

i mean x = 4
but its asking for the first step
i also that it is the first step....
*mean
ok
thanks...

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