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x in (-oo:+oo)
6*(6-(4*x)) = 252 // - 252
6*(6-(4*x))-252 = 0
6*(6-4*x)-252 = 0
6*(6-4*x)-252 = 0
-24*x-216 = 0
-24*x-216 = 0
-24*x-216 = 0 // + 216
-24*x = 216 // : -24
x = 216/(-24)
x = -9
x = -9
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