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x in (-oo:+oo)
8-((3/7)*x) = 92/7 // - 92/7
8-((3/7)*x)-(92/7) = 0
(-3/7)*x-92/7+8 = 0
-3/7*x-36/7 = 0 // + 36/7
-3/7*x = 36/7 // : -3/7
x = 36/7/(-3/7)
x = -12
x = -12
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