Solve for r.
Ar + By = C

r = (C - By) / A

Step-by-step explanation:

Ar + By = C

-By -By

[Subtract both sides by By (Subtraction poe)]

Ar = C - By

(Ar) = (C - By)

[Use parenthesis to group both terms (Associative property of equality)]

÷A ÷A

[Divide both sides by A to isolate r so it can be solved (Division poe)]

r = (C - By) / A

2? if not the correct answer you might need to provide more information

step-by-step explanation: