A line passes through the points (-3,-5) and (8,7). The equation of this line can be expressed in the form Ax + By = C, where A, B, and C are integers with greatest common divisor 1 and A is positive. Find A + B + C.
Find slope between the two lines to be 12/11
point slope form ( use either point)
y-7 = 12/11 ( x-8) multiply by 11 to get rid of fraction
11y -77 = 12x - 96 re-arrange
-12x+11y = - 19 since A needs to be positive, multiply through by -1
12x -11y = 19