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t in (-oo:+oo)
22/8 = t/20 // - t/20
22/8-(t/20) = 0
11/4-1/20*t = 0 // - 11/4
-1/20*t = -11/4 // : -1/20
t = -11/4/(-1/20)
t = 55
t = 55
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