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