SOLUTION: I have this problem and I dont see how the answer book got the answer of -1. I am working on finding the slope of lines. This is the problem: 2x+2y+1=0. I cancel oout the 2y

Algebra ->  Linear-equations -> SOLUTION: I have this problem and I dont see how the answer book got the answer of -1. I am working on finding the slope of lines. This is the problem: 2x+2y+1=0. I cancel oout the 2y       Log On


   

Question 672311: I have this problem and I dont see how the answer book got the answer of -1. I am working on finding the slope of lines. This is the problem: 2x+2y+1=0.
I cancel oout the 2y by divinding by 2 all aound. I come up with y=-x-1/2. My points are (0,-1/2) which I see then the answer book says (1,-3/2) which I dont see how they got that for the second point. Can you explain it to me. thank you!
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

2x+2y+1=0  ⇒  y+=+-x+-+1%2F2   Yes.  Good work.

IF  x = 1  ⇒  y+=+-%281%29-1%2F2+=+-3%2F2

Thus the listing for the (x,y) ordered pair (1,-3/2)