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x in (-oo:+oo)
3-((1/3)*x)-1 = 49 // - 49
3-((1/3)*x)-49-1 = 0
(-1/3)*x-49-1+3 = 0
-1/3*x-47 = 0 // + 47
-1/3*x = 47 // : -1/3
x = 47/(-1/3)
x = -141
x = -141
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