Respuesta :

renknee

Answer:

r = [tex]\frac{A-P}{Pt}[/tex]

Step-by-step explanation:

Step 1: Subtract P from both sides.

  • [tex]P+Prt-P=A-P[/tex]
  • [tex]Prt= A - P[/tex]

Step 2: Divide both sides by Pt.

  • [tex]\frac{Prt}{Pt} = \frac{A-P}{Pt}[/tex]
  • [tex]r= \frac{A-P}{Pt}[/tex]