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13/6-((8*x)/6) = (27*x)/6-(57/6) // - (27*x)/6-(57/6)
13/6-((8*x)/6)-((27*x)/6)+57/6 = 0
(-4/3)*x+(-9/2)*x+13/6+57/6 = 0
35/3-35/6*x = 0 // - 35/3
-35/6*x = -35/3 // : -35/6
x = -35/3/(-35/6)
x = 2
x = 2
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