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y-1 = (-3/2)*(x-4) // - (-3/2)*(x-4)
y-((-3/2)*(x-4))-1 = 0
(3/2)*(x-4)+y-1 = 0
3/2*(x-4)+y-1 = 0
3/2*(x-4)+y-1 = 0
3/2*x+y-6-1 = 0
3/2*x+y-7 = 0
3/2*x+y-7 = 0
3/2*x+y-7 = 0 // - y-7
3/2*x = -(y-7) // : 3/2
x = (-(y-7))/3/2
x = 2/3*(7-y)
x = 2/3*(7-y)
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