Question

SIMPLE QUESTION: Solve. Check. Explain. :D
2x - 7y = 3
-2x + y = -9

Sytems of equations: Addition/Elimination method

(I'm repeatedly getting this question wrong..)

Answer 1

Add the two equations together, what do you get?

Answer 2

I'm having trouble adding the 2 equations together..
because x and y both end up being 0

Answer 3

2x+(-2x)=0

but -7y+y=-6y

Answer 4

No.. I mean I got this when I added the two equations:
0x + 0y = 6

How did you get -7y+y=-6y

Answer 5

ok, add the x together, the y together and the constants together

the x will give you 0

-7y+y and the coefficients -7+1=-6

so -6y=-6

Answer 6

OH. Oh my god.. How did I miss that..?

Answer 7

I dunno =p

Should be easy now though

Answer 8

Can you solve it anyways..? Well..actually. Hang on..let me solve this..and tell me whether or not my answer is right..

Answer 9

y = -1
and
x = -4

That's what I got..

Answer 10

SORRY. x = 4

Answer 11

well from

-6y=-6
y=-6/-6
y=1

now plug that back in to find x