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F(y) =
x +

G(y) =
x +

A line is *y = mx + b*

where **x** and **y** are coordinates, **m** is the slope, and **b** is the y-intercept

so to calculate the point where the lines intersect we substitute and get

x = (b1-b2)/(m2-m1)

y = x*m1+b1 = x*m2+b2