Final answer:
To solve the equation 1.25r - 7 = 2.5 for r, add 7 to both sides, divide by 1.25, and calculate to find that r = 7.6.
Step-by-step explanation:
To solve for r in the equation 1.25r - 7 = 2.5, follow these steps:
- Add 7 to both sides of the equation to isolate terms with r on one side: 1.25r - 7 + 7 = 2.5 + 7.
- Simplify the equation: 1.25r = 9.5.
- Divide both sides by 1.25 to solve for r: r = 9.5 / 1.25.
- Calculate the value of r: r = 7.6.
The solution is r = 7.6.