Question

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Answer 1

2x=-7y-1

Answer 2

x=-2y+10

Answer 3

ok..what do i do next

Answer 4

I'm just taking a guess here, but can't you use what Huneya gave you and solve it with substitution? One of the equations is already set up for easy substitution of "x." If I calculated it right, I would take the 2x=-7y-1 and replace x with -2y+10, so you would just be solving for y. When I did it I ended up with y=-7, then I just substituted that back into (either) equation and ended up with x=24.

Answer 5

@huneya solved for x. Just plug that into another pair of equations.
x = -2y + 10 -> -7y - 1 = -4y + 20 -> 3y = -21 -> y = -7
Now plus it back in to solve for x.
x = -2y + 10
x = -2(-7) + 10
x = ?