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7*x-(9*((6/5)*x-3)) = 8*m // - 8*m
7*x-(9*((6/5)*x-3))-(8*m) = 0
7*x-9*((6/5)*x-3)-8*m = 0
7*x-9*(6/5*x-3)-8*m = 0
7*x-9*(6/5*x-3)-8*m = 0
7*x-8*m-54/5*x+27 = 0
27-8*m-19/5*x = 0
27-8*m-19/5*x = 0
27-8*m-19/5*x = 0 // - 27-8*m
-19/5*x = -(27-8*m) // : -19/5
x = (-(27-8*m))/(-19/5)
x = 5/19*(27-8*m)
x = 5/19*(27-8*m)
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