6. The straight line \(L _ { 1 }\) passes through the points \(( - 1,3 )\) and \(( 11,12 )\).
- Find an equation for \(L _ { 1 }\) in the form \(a x + b y + c = 0\), where \(a\), \(b\) and \(c\) are integers.
The line \(L _ { 2 }\) has equation \(3 y + 4 x - 30 = 0\).
- Find the coordinates of the point of intersection of \(L _ { 1 }\) and \(L _ { 2 }\).