Beginning with the equation Ax + By = C, Gandalf subtracted Ax from both sides to get

By = -Ax + C,

then he divided both sides by B to get

y = -A/B x + C/B.

What is ONE reason he might have done this?
A) to find the slope
B) to find the x-intercept
C) to write the equation in standard form
D) to write the equation in point-slope form