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t in (-oo:+oo)
3*t+9/10 = 339/10 // - 339/10
3*t+9/10-(339/10) = 0
3*t+9/10-339/10 = 0
3*t-33 = 0 // + 33
3*t = 33 // : 3
t = 33/3
t = 11
t = 11
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