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I don't understand this question:
If A=p+prt, then t equals

User Lfaraone
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A=p+prt\\ \\prt=A-p \ \ / : (pr) \\\\t=(A-p)/(pr)=(A)/(pr)-(p)/(pr)=(A)/(pr)-\frac{1} {r}


User Marnun
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