First, you need to simplify each respective expression before adding them together.
The first expression is 3x7, which equals 21.
The second expression is 9x-3.
Therefore, the simplified equation becomes 21 + (9x-3).
Now, you can combine like terms by adding the constant terms together.
21 + (-3) equals 18.
Thus, the final answer is 18 + 9x.
(3x7) + (9x-3)
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