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x in (-oo:+oo)
1100/30 = x/20 // - x/20
1100/30-(x/20) = 0
110/3-1/20*x = 0 // - 110/3
-1/20*x = -110/3 // : -1/20
x = -110/3/(-1/20)
x = 2200/3
x = 2200/3
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