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x in (-oo:+oo)
6 = (3*x)/100 // - (3*x)/100
6-((3*x)/100) = 0
(-3/100)*x+6 = 0
6-3/100*x = 0 // - 6
-3/100*x = -6 // : -3/100
x = -6/(-3/100)
x = 200
x = 200
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