Answer:
B.
Step-by-step explanation:
Since 21 is divided by 3 you might think that it is equivalent but remeber you have to divide by both sides, so if you divide 21 by 7 it works but 28 by seven does not! Hope this helps!
Answer:

Step-by-step explanation:

Hope this helps!
Answer:
subtract 1510 by 830 and your answer will be..... thats for u too decide sir/mam