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x in (-oo:+oo)
1/6-4*x = 29/30 // - 29/30
1/6-4*x-(29/30) = 0
1/6-4*x-29/30 = 0
-4*x-4/5 = 0 // + 4/5
-4*x = 4/5 // : -4
x = 4/5/(-4)
x = -1/5
x = -1/5
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