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t in (-oo:+oo)
-((2/7)*t)-2 = -24/7 // + -24/7
-((2/7)*t)-(-24/7)-2 = 0
(-2/7)*t+24/7-2 = 0
10/7-2/7*t = 0 // - 10/7
-2/7*t = -10/7 // : -2/7
t = -10/7/(-2/7)
t = 5
t = 5
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