Answer:
a=2x-b
Step-by-step explanation:

Because they dont have variables
Answer:
4r- 21
Step-by-step explanation:
4 - r= r and r+ 21/= R21 and Simplified Is -4 and R21
The second one u picked is not correct. Plug on the answers for all the options making sure that they match up with the expression in the question
The answer is 60,000. because it would equal six hundred thousand, and that divided by 10 is 60,000