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Q in (-oo:+oo)
19 = (2000-(2*Q))/50 // - (2000-(2*Q))/50
19-((2000-(2*Q))/50) = 0
19-((2000-2*Q)/50) = 0
(-1*(2000-2*Q))/50+19 = 0
(-1*(2000-2*Q))/50+(19*50)/50 = 0
19*50-1*(2000-2*Q) = 0
2*Q-1050 = 0
(2*Q-1050)/50 = 0
(2*Q-1050)/50 = 0 // * 50
2*Q-1050 = 0
2*Q-1050 = 0 // + 1050
2*Q = 1050 // : 2
Q = 1050/2
Q = 525
Q = 525
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