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t in (-oo:+oo)
-(3*t)-6 = 4*t-76 // - 4*t-76
76-(3*t)-(4*t)-6 = 0
76-3*t-4*t-6 = 0
70-7*t = 0 // - 70
-7*t = -70 // : -7
t = -70/(-7)
t = 10
t = 10
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