Answer:
r=4
Step-by-step explanation:
First you multiply 4 by r which gives you 4r. Then you multiply 4 by 2 to give you 8.So it looks like this now
4r+8-13=11
Now you add thirteen to both sides and get
4r+8= 24
Then you subtract both sides by 8 to get 16
4r=16
Then you divide both sides by 4 to get 4
r=4
