math
posted by marie .
how would you find the intersection of these three lines
209x+323y=28677
88s+1012y=93412
31x+21y=2299

Your second equation has a different variable, s. Is that supposed to be x?
If so, the three lines probably do not intersect at a single point.
You can get the intersection of the first and third equation's lines by solving the two equations simultaneously.