0.1t+0.05(20-t)=0.09(20)

0.1t+0.05(20-t)=0,09(20)
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1 Answer

0.1t +0.05(20 -t) = 0.09(20)

10t +5(20-t) =9*20

10t -5t +100=180

5t=180-100

5t=80

t=16
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