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c = 6*n-(((5*m)/11)*x) // - 6*n-(((5*m)/11)*x)
c+((5*m)/11)*x-(6*n) = 0
c+((5*m)/11)*x-6*n = 0
c+5/11*m*x-6*n = 0 // - c-6*n
5/11*m*x = -(c-6*n) // : 5/11*m
x = (-(c-6*n))/(5/11*m)
x = -11/5*m^-1*(c-6*n)
x = -11/5*m^-1*(c-6*n)
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