Linear Algebra, Matrix, Inverse, Determinants, Mathematics.
both sides by = p — ax Divide by b: y = p/b + (-a/b)x It can be concluded that our slope is -a/b. Now what about the second equation. Well you could use the same logic and get the slope to be -c/d. The scenarios where you don’t get a nice clean unique equation is when they(-a/b and -c/d) are equal