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12.5 = ((2*x)^1)/3 // - ((2*x)^1)/3
12.5-(((2*x)^1)/3) = 0
(-2/3)*x+12.5 = 0
12.5-2/3*x = 0 // - 12.5
-2/3*x = -12.5 // : -2/3
x = -12.5/(-2/3)
x = 18.74999991
x = 18.74999991
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