1) First find the slope of 4x - 2y + 6 = 0

Then, use the point-slope form of the equation to define another line through P(4, 6) using the same slope. (Slopes of parallel lines are equal)

y - y1 = m(x - x1)

2) Solve the equation for y.

y = mx + b

m = gradient

b = y-intercept