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