help. thx in advance

THX IN ADVANCE.

 

Express the equation of the line passing through points \((1,7)\) and \((-2,-3)\) in the form \(ax+by=c\), where \(a\), \(b\) and \(c\) are integers, the greatest common divisor of \(a\) and \(b\) is 1, and \(c<0\).