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i in (-oo:+oo)
-((2*i)/7)-(8*i)-1 = 0
(-2/7)*i-8*i-1 = 0
-58/7*i-1 = 0 // + 1
-58/7*i = 1 // : -58/7
i = 1/(-58/7)
i = -7/58
i = -7/58
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