Question

Solve Graph & Use Substitution or elimination?
3y=x+6
Y+2=-x it says solve and use either elimination or substiution. for the first problem I divided all of the problems by 3. but I don't know if its right because the slope would be x/3?? Help! I got the same answer for substitution and on the calc (-3,1) but I couldn't graph it I kept getting (-1,-1)?

Answer 1

y = -x - 2
now sub this into the other equation
3y = x + 6
3(-x - 2) = x + 6
-3x - 6 = x + 6
-6 - 6 = x + 3x
- 12 = 4x
- 3 = x
now sub -3 in for x
y = - x - 2
y = -(-3) - 2
y = 3 - 2
y = 1
Your ordered pair is (-3,1)

Answer 2

Thanks how would I graph this though? Like I got it in slope intercept form by:
Y= x/3 +2
Y= -x-2.
Is it right that slope= x/3 that seems weird to me. I got that same pair (-3,1) but not the graph? Thank you!

Answer 3

y = mx + b
3y = 1x + 6 --> x is the same as 1x
y = 1/3x + 2
slope is 1/3 and y intercept is 2

Answer 4

Ok thanks alot!!

Answer 5

your welcome..glad to help :)