Question

A=P+Prt for r what does r =

Answer 1

r =
`(A-P)/(Pt)`

Explanation:

Express the equation with the term in r on the left side

P + Prt = A ( subtract P from both sides )

Prt = A - P ( isolate r by dividing both sides by Pt )

r =
`(A-P)/(Pt)`