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y-150 = (-5/6)*(x-60) // - (-5/6)*(x-60)
y-((-5/6)*(x-60))-150 = 0
(5/6)*(x-60)+y-150 = 0
5/6*(x-60)+y-150 = 0
5/6*(x-60)+y-150 = 0
5/6*x+y-150-50 = 0
5/6*x+y-200 = 0
5/6*x+y-200 = 0
5/6*x+y-200 = 0 // - y-200
5/6*x = -(y-200) // : 5/6
x = (-(y-200))/5/6
x = 6/5*(200-y)
x = 6/5*(200-y)
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