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Y = (-9/4)*x-5 // - (-9/4)*x-5
Y-((-9/4)*x)+5 = 0
Y+(9/4)*x+5 = 0
Y+9/4*x+5 = 0 // - Y+5
9/4*x = -(Y+5) // : 9/4
x = (-(Y+5))/9/4
x = -4/9*(Y+5)
x = -4/9*(Y+5)
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