Posted by **Candy** on Wednesday, August 26, 2009 at 5:35pm.

how do you solve this equation: 12n=9(n+10)

- math -
**Ms. Sue**, Wednesday, August 26, 2009 at 5:49pm
12n=9(n+10)

12n = 9n + 90

12n - 9n = 9n - 9n + 90

3n = 90

n = ?

- math -
**DrBob222**, Wednesday, August 26, 2009 at 5:51pm
12n=9(n+10)

**remove parentheses
**

12n = 9n+90

Move unknown (n) to the same side by subtracting 9n from both sides.

12n-9n = 9n-9n+90

combine terms.

3n=90

divide both sides by 3.

3n/3 = 90/3

n=?

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