I think this is how you do it
I'm doing the exact same one an i got 48 cubic units for the volume. I still have to draw the rectangular figure though.
Given: 7r+3r-8=8+2r
Simplify: 10r-8=8+2r
Addition: add 8 to each side: 10r=16+2r
Subtraction: Take 2r from each side: 8r=16
Division: Divide each side by 8 for answer: r=2
Answer: r=2
Answer:
20
Step-by-step explanation:
When you add them all up and divide by seven, you get 20
The highest common factor is 13
