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y-128 = (20/11)*(x+0) // - (20/11)*(x+0)
y-((20/11)*(x+0))-128 = 0
(-20/11)*x+y-128 = 0
y-20/11*x-128 = 0 // - y-128
-20/11*x = -(y-128) // : -20/11
x = (-(y-128))/(-20/11)
x = -11/20*(128-y)
x = -11/20*(128-y)
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