You use it during your life spand
Answer:
Adding 5 from both sides then dividing by 7
Step-by-step explanation:
The best way to isolate x is to add 5 to both sides first:
21 = 7x
Then to isolate x by itself divide both sides by 7
x = 3
That would be the value of x and your final answer.
-12
Step-by-step explanation:
We know 12 divided by 4 is 3 so the same is so in the negatives
