Question

2x+8y=2
-2x-4y=6
solve by using elimination by addition or subtraction

Answer 1

\[2x+8y=2\]
\[-2x-4y=6\]
adding the second equation to the first yields
\[2x-2x+8y-4y=2+6\]
\[4y=8\]
\[y=2\]
\[2x+8(2)=2\]
\[2x=-14\]
\[x=-7\]
Thus
\[y=2\]
\[x=-7\]

Answer 2

where did you get 14?

Answer 3

\[2x+8(2)=2\]
\[2x+16=2\]
\[2x+16 -16=2 -16\]
\[2x+16=2\]
\[2x=-14\]
\[x=-7\]

Answer 4

oh i see i didnt take that extra step