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X/8-(x/3) = 5 // - 5
X/8-(x/3)-5 = 0
1/8*X-1/3*x-5 = 0 // - 1/8*X-5
-1/3*x = -(1/8*X-5) // : -1/3
x = (-(1/8*X-5))/(-1/3)
x = -3*(5-(1/8*X))
x = -3*(5-(1/8*X))
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