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x in (-oo:+oo)
-7*x-6 = (-3/8)*x-14 // - (-3/8)*x-14
14-7*x-((-3/8)*x)-6 = 0
(3/8)*x-7*x-6+14 = 0
8-53/8*x = 0 // - 8
-53/8*x = -8 // : -53/8
x = -8/(-53/8)
x = 64/53
x = 64/53
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