Question

attachment in comments

Answer 1

x + y = 12
y = -5x

Well you know that y = -5x...so you substitute that into the first equation for 'y'

x + y = 12

Becomes

x + (-5x) = 12

and simplify

x - 5x = 12

-4x = 12

x = ?

Answer 2

Then once you solve that...you have what 'x' equals....so you would plug that into one of your 2 equations (lets do the second one) and solve for 'y'

y = -5x

after plugging in x = ...? you have

y = -5(...?)

Trying not to just say the answer :P

Answer 3

1? I think I'm just really tired cause this should be easy lol