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7n = 3n + 28 .... Help?

I couldn't go to class today. My car is in the shop! GREAT!

Can somebody explain this to me?
"Solving equations with terms on both sides"

I can do it normally, but now its backwards?

 
Anonymous

Asked by Anonymous at 11:48 AM on Jan. 24, 2011 in

This question is closed.
Answers (6)
  • subtract 3 from 3n and 7n then divide the answer (4n) into 28 and the answer will be n=7
    ihave10kids

    Answer by ihave10kids at 11:52 AM on Jan. 24, 2011

  • You have to balance it out by subtracting 3n from both sides. You are now left with 4n = 28. Divide both sides by 4 and you are left with n = 7.
    JeremysMom

    Answer by JeremysMom at 11:51 AM on Jan. 24, 2011

  • Subtract 3n from both sides. Left with 4n=28 Then divide both sides by 4 and n=7
    Melbornj

    Answer by Melbornj at 11:52 AM on Jan. 24, 2011

  • Minus 3N from the side it is on and minus it from the other side as well. Then it should be 7n-3n=28.

    Which means 4n=28. Then divide both sides by 4 which means N= 7
    ria7

    Answer by ria7 at 11:52 AM on Jan. 24, 2011

  • 7n = 3n + 28
    Subtract 3n from both sides. 7n-3n=3n-3n+28. 4n=28. Divide both sides by 4. 4n/4=28/4. n=7. You have to combine like amounts, and isolate n. To do this, your goal should always be to get the variable on one side of the equation. It gets harder when you have multiple variables. GL!
    BisketLiss

    Answer by BisketLiss at 11:53 AM on Jan. 24, 2011

  • LOOK LIKE WE HAVE SOME MATH WIZ"S ON THE BOARD~ YOU GO GIRLS!
    rebeccadac

    Answer by rebeccadac at 12:02 PM on Jan. 24, 2011

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