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x in (-oo:+oo)
2*4*n = 7*x+6/5 // - 7*x+6/5
2*4*n-(7*x)-(6/5) = 0
2*4*n-7*x-6/5 = 0
8*n-7*x-6/5 = 0 // - 8*n-6/5
-7*x = -(8*n-6/5) // : -7
x = (-(8*n-6/5))/(-7)
x = (6/5-(8*n))/(-7)
x = (6/5-(8*n))/(-7)
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