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x in (-oo:+oo)
(100*x)/7.5 = 2000 // - 2000
(100*x)/7.5-2000 = 0
13.33333333*x-2000 = 0 // + 2000
13.33333333*x = 2000 // : 13.33333333
x = 2000/13.33333333
x = 150.00000004
x = 150.00000004
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