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Y-4 = (7/3)*(x-3) // - (7/3)*(x-3)
Y-((7/3)*(x-3))-4 = 0
(-7/3)*(x-3)+Y-4 = 0
Y-7/3*(x-3)-4 = 0
Y-7/3*(x-3)-4 = 0
Y-7/3*x-4+7 = 0
Y-7/3*x+3 = 0
Y-7/3*x+3 = 0
Y-7/3*x+3 = 0 // - Y+3
-7/3*x = -(Y+3) // : -7/3
x = (-(Y+3))/(-7/3)
x = 3/7*(Y+3)
x = 3/7*(Y+3)
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