Question

Wth is this like algebra makes no sense

Answer 1

r = (A-P) x (Pt)

Explanation:

Solve for r, means make r the subject of the formula, write r in terms of all the other variables.

P+Prt= A

Prt=A-P

r=(A-P) x (Pt)

Answer 2

i don't even trust myself but all i can think of is this:

A = P + Prt

-P -P

A - P = Prt

------ ------

Pt Pt

r = A - P

-------

Pt