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t in (-oo:+oo)
46 = 2*t+5*t+4 // - 2*t+5*t+4
46-(2*t)-(5*t)-4 = 0
46-2*t-5*t-4 = 0
42-7*t = 0 // - 42
-7*t = -42 // : -7
t = -42/(-7)
t = 6
t = 6
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