Answer:
r=0
Explanation:
10r-5r=3r-8r
We move all terms to the left:
10r-5r-(3r-8r)=0
We add all the numbers together, and all the variables
10r-5r-(-5r)=0
We add all the numbers together, and all the variables
5r-(-5r)=0
We get rid of parentheses
5r+5r=0
We add all the numbers together, and all the variables
10r=0
r=0/10
r=0