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y-5 = (3/4)*(x-12) // - (3/4)*(x-12)
y-((3/4)*(x-12))-5 = 0
(-3/4)*(x-12)+y-5 = 0
y-3/4*(x-12)-5 = 0
y-3/4*(x-12)-5 = 0
y-3/4*x-5+9 = 0
y-3/4*x+4 = 0
y-3/4*x+4 = 0
y-3/4*x+4 = 0 // - y+4
-3/4*x = -(y+4) // : -3/4
x = (-(y+4))/(-3/4)
x = 4/3*(y+4)
x = 4/3*(y+4)
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