10n+12-9-7n+4n=31, does anyone know the right answer

2 answers:

5 0

We are solving for n. The first thing to do when solving for any variable is to add like terms.

10n+12-9-7n+4n=31

10n, -7n, and 4n are like terms because they have the same variable(n). 12 and -9 are like terms because there are both constants.

10n+12-9-7n+4n=31

7n+3=31
-3=-3
-------------
7n=28
--- ----
7 7

n=4

If you want to check your answer, you simply plug the variable back into the displayed equation. Have a good day!

Tems11 [23]3 years ago

4 0

The answer is n=4. Hope i helped!!!

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