Answer:

Step-by-step explanation:
Since we know -7x=y we use the substitution method and plug it in the top equation.



or x=-2/3
Then plug it back in the the bottom equation

y=14/3
I think the answer is: -3/7x
Multiply first equaton by -1 and add to first
-2x+y=7
<u>4x-y=-4 +</u>
2x+0y=3
2x=3
divide 2
x=3/2
sub
2x-y=-7
2(3/2)-y=-7
3-y=-7
minus 3
-y=-10
negative 1 times both sides
y=10
(3/2,10)
(1.5,10)
B is ansre