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x in (-oo:+oo)
-3*x-(7/3) = 29/3 // - 29/3
-3*x-(7/3)-(29/3) = 0
-3*x-7/3-29/3 = 0
-3*x-12 = 0 // + 12
-3*x = 12 // : -3
x = 12/(-3)
x = -4
x = -4
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