Step-by-step explanation:
You said the other one would be the last haha just kidding I'm glad to help.
16. 
First, get rid of that parenthesis.

Now multiply both sides by 2 so that you can isolate k


19. 
This is a pretty easy one. If you didn't know, 121/11 is actually 11 :)

Simply multiply by 3 to isolate r :)


Answer:
D=-26
Step-by-step explanation:
Answer:
You can do 120 situps
Step-by-step explanation:
45/3=15
15x8=120
120 situps