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Y+3 = (-9/2)*(x+1) // - (-9/2)*(x+1)
Y-((-9/2)*(x+1))+3 = 0
(9/2)*(x+1)+Y+3 = 0
9/2*(x+1)+Y+3 = 0
9/2*(x+1)+Y+3 = 0
Y+9/2*x+3+9/2 = 0
Y+9/2*x+15/2 = 0
Y+9/2*x+15/2 = 0
Y+9/2*x+15/2 = 0 // - Y+15/2
9/2*x = -(Y+15/2) // : 9/2
x = (-(Y+15/2))/9/2
x = -2/9*(Y+15/2)
x = -2/9*(Y+15/2)
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