Respuesta :
You’d have to try to get r on one side of the equation.
You can do that by subtracting 12 from both sides which would make it so
R = -9
You can do that by subtracting 12 from both sides which would make it so
R = -9
Answer:-9
Step-by-step explanation:Subtract 12 from both sides of the equation
hope i helped u have a great day