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t = 28
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19-2t = 7 -2t = 7-19 -2t = -12 t = 6
An equation?
4000 lbs.
89+2t = 10t+25 89-25 = 10t-2t 64 = 8t t = 8
12(t+6)+8=4(2t-1)+2t 12t+72+8=8t-4+2t 12t-2t-8t=-72-8-4 2t=-84 2t/2=84/2 t=42