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x in (-oo:+oo)
6*(10-6*x) = 348 // - 348
6*(10-6*x)-348 = 0
6*(10-6*x)-348 = 0
-36*x-288 = 0
-36*x-288 = 0
-36*x-288 = 0 // + 288
-36*x = 288 // : -36
x = 288/(-36)
x = -8
x = -8
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