Final answer:
To solve the equation a=b+rb for r, subtract b from both sides of the equation and then divide both sides by b.
Step-by-step explanation:
To solve the equation a=b+rb for r, we need to isolate the r variable. Here are the steps:
- Start by subtracting b from both sides of the equation: a - b = rb
- Now, divide both sides of the equation by b: (a - b) / b = r
Therefore, the solution for r is (a - b) / b.