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tatilynnsoto17
19.11.2019 •
Mathematics
10n+12-9-7n+4n=31, does anyone know the right answer
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Ответ:
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!
Ответ: