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x in (-oo:+oo)
6-(7*x) = x-(145/2) // - x-(145/2)
145/2-(7*x)-x+6 = 0
145/2-7*x-x+6 = 0
157/2-8*x = 0 // - 157/2
-8*x = -157/2 // : -8
x = -157/2/(-8)
x = 157/16
x = 157/16
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