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6 + 3 + 21 + 63 + 21 = 114
212 + (21/3) = 219.
To add one third and one seventh, we need to find a common denominator. The least common multiple of 3 and 7 is 21. So, we can rewrite one third as 7/21 and one seventh as 3/21. Adding these fractions together, we get 7/21 + 3/21 = 10/21. Therefore, one third plus one seventh is 10/21.
9a+21 3(3a+7)
The answer is 21 because if 21 is divided by 3 it equals 7 plus 4 equals 11.