Answer:
x=5
Step-by-step explanation:
21-x=4x-4. You first would subtract 21 from both sides, so 21-21 is gone, and -4-21 is -25. Next, you would subtract 4x from both sides, -x-4x= -5 and 4x-4x is 0, aka gone. Now, you have -5x = -25. You now divide both sides by -5. -5/-5 cancels out. -25/-5 is 5. All you are left with is x = 5(because a negative divided by a negative is a positive). Hope this helps! :)
