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n in (-oo:+oo)
5*n+6*n-8 = -34/7 // + -34/7
5*n+6*n-(-34/7)-8 = 0
5*n+6*n+34/7-8 = 0
11*n-22/7 = 0 // + 22/7
11*n = 22/7 // : 11
n = 22/7/11
n = 2/7
n = 2/7
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