9n + n = 10n
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n - 10 + 9n - 3 n + 9n - 10 - 3 10n - 13
n-10+(9n-3)=10n-13
You need to get n alone.9n=45 → Divide by 9n=45/9n=5
your equation is this 9N=63 9N/9=63/9 N=7 your answer is 7
11m + 6n - 2m + 9n = 9m + 15n or 3(3m + 5n)