The system of equations $4 x+6 y=5$ and $8 x+12 y=10$ has

A line passes through $(-1,-3)$ and perpendicular to $x+6 y=5$. Its $x$ intercept is

The angle between the line $x+y=3$ and the line joining the points $(1,1)$ and $(-3,4)$ is

A line passes through $$(2,2)$$ and is perpendicular to the line $$3 x+y=3$$. Its $$y$$-intercept is