Answer:
Question 19: x=9
Question 20: r<-6
Step-by-step explanation:
For question 19, the answer is nine because if you first add 5to both sides, it would be 18= 2r. If you divide both sides by 2, you would get 9=r.
For question 20, if you subtract 7 on each side, you would get -2r=12 if you divide -2 on each side, r would be -6.
