Answer:
R=A/PT-P/T
Explanation:
A=P+PRT
-P -P
_______
A-P=PRT
÷PT ÷PT
A/PT-P/T=R
(A-P)/PT = R
Subtract P from each side
A-P=P-P+PRT
A- P = PRT
Divide each side by PT
(A-P)/PT = PRT/PT
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