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Sec 1.4: Linear equations and the integrating factor 8 Previous A fish tank initially contains 10 liters of pure water. Brine
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x= amount of salt in solution rias ll minutes ro = 5L (minutes (i= c = incoming concentration. vet) = 10 + (0; -910) t = 10 +habe -0.5 (+ r) har en 2-0.5 (*- eo) olz = -0.9 (OC-10c) da =-0.5 at X-100 Samor dx = fro.s at en COC-100) = -0.5t to . -0,5tA . 010c tc, e o= 100 trie 0=10C +C, C13-100 put in ean 0 x= 106 = 100 e oste (6) in 35 minutes, 25 grams of x (35)=25 there

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