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t in (-oo:+oo)
9*t-((2*(2*t-1))/9) = 10 // - 10
9*t-((2*(2*t-1))/9)-10 = 0
(-2/9)*(2*t-1)+9*t-10 = 0
9*t-2/9*(2*t-1)-10 = 0
9*t-2/9*(2*t-1)-10 = 0
77/9*t-10+2/9 = 0
77/9*t-88/9 = 0
77/9*t-88/9 = 0
77/9*t-88/9 = 0 // + 88/9
77/9*t = 88/9 // : 77/9
t = 88/9/77/9
t = 8/7
t = 8/7
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