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7*y-2 = (51/2)*x-(1/2) // - (51/2)*x-(1/2)
7*y-((51/2)*x)+1/2-2 = 0
(-51/2)*x+7*y+1/2-2 = 0
7*y-51/2*x-3/2 = 0 // - 7*y-3/2
-51/2*x = -(7*y-3/2) // : -51/2
x = (-(7*y-3/2))/(-51/2)
x = -2/51*(3/2-(7*y))
x = -2/51*(3/2-(7*y))
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