Question 300401
Lines that cross have one solution.

Lines that don't cross have no solutions
Lines that are equivalent have an infinite number of solutions.
Since there are two solutions they must be equivalent.
Therefore -2,12 and 6,7 are solutions and points on the line.

to get the slope we y-y/x-x=m
12-7/-2-6=5/-8=-5/8
y=-5x/8+b
7=-5*6/8+b
7=-30/8+b
56/8+30/8=b
86/8=b
43/4=b
y=-5x/8+43/4
8y=-5x+86
check other point
8*12=-5*-2+86
96=10+86
96=96
There are an infintie number of solutions