11m + 6n - 2m + 9n
= 9m + 15n or 3(3m + 5n)
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If it is: 13m+5n-6m+9n Then simplified it is: 7m+14n
9n + n = 10n
n-10+(9n-3)=10n-13
n - 10 + 9n - 3 n + 9n - 10 - 3 10n - 13
You need to get n alone.9n=45 → Divide by 9n=45/9n=5