Answer:
Explanation:
To find the value of r, isolate it on one side of the equation.

First, you have to subtract by 8 from both sides.

Solve.
Subtract the numbers from left to right.
26-8=18
2r=18
Divide by 2 from both sides.

Solve.
Divide the numbers from left to right.
18/2=9
r=9
- Therefore, the correct answer is r=9 meters.
I hope this helps. Let me know if you have any questions.