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y-7 = (8/9)*x-(16/9) // - (8/9)*x-(16/9)
y-((8/9)*x)+16/9-7 = 0
(-8/9)*x+y+16/9-7 = 0
y-8/9*x-47/9 = 0 // - y-47/9
-8/9*x = -(y-47/9) // : -8/9
x = (-(y-47/9))/(-8/9)
x = -9/8*(47/9-y)
x = -9/8*(47/9-y)
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