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-3t
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7p+5t
3t - 1
2t^2+5t-3=0 (2t-1)(t+3)=0 2t-1=0 and t+3=0 t=.5 and t=-3
R = S + 2T S = 3T .... substitute R = (3T) + 2T R = 5T
3r + 3r + 2t = 6r + 2t