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t in (-oo:+oo)
2-3*t-(4*t) = 65 // - 65
2-3*t-(4*t)-65 = 0
2-3*t-4*t-65 = 0
-7*t-63 = 0 // + 63
-7*t = 63 // : -7
t = 63/(-7)
t = -9
t = -9
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