## Solve for r: P = A / (1 + rt)

Simplificatation, evaluation, linear equations, linear graphs, linear inequalities, basic word problems, etc.

### Solve for r: P = A / (1 + rt)

Solve for r: P= _A_
( 1+ rt)
shellyisawesome

Posts: 2
Joined: Wed Mar 18, 2009 7:13 am

shellyisawesome wrote:Solve for r: P= _A_
( 1+ rt)

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I will guess that the above means "Solve P = A / (1 + rt) for r", as the subject line says. To clarify with LaTeX:

. . . . .$\mbox{Solve }\, P\, =\, \frac{A}{1\, +\, rt}\, \mbox{ for }\, r$

If so, then the first step in solving this literal equation should probably be multiplying through by the denominator to get:

. . . . .$P(1\, +\, rt)\, =\, A$

. . . . .$P\, +\, Prt\, =\, A$

Subtract the "P" to the right-hand side, and then divide both sides by "Pt" to isolate "r".

stapel_eliz

Posts: 1704
Joined: Mon Dec 08, 2008 4:22 pm