Let's clarify and properly apply the distributive property to the expression you provided. It seems you have an equation involving the expression \(3(7+3m)\). Let's distribute the \(3\) on the left side:
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Start with the left side of the equation:
\[ 3(7 + 3m) \]
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Use the distributive property to distribute \(3\) to both terms inside the parentheses:
\[ 3 \cdot 7 + 3 \cdot (3m) \]
This results in:
\[ 21 + 9m \]
Now, assuming you have an equation that looks like this:
\[ 3(7 + 3m) = 3 + 3m \]
After applying the distributive property, we can rewrite the equation as:
\[ 21 + 9m = 3 + 3m \]
To isolate \(m\), you can rearrange this equation. First, subtract \(3m\) from both sides:
\[ 21 + 9m - 3m = 3 \]
This simplifies to:
\[ 21 + 6m = 3 \]
Next, subtract \(21\) from both sides:
\[ 6m = 3 - 21 \]
This simplifies to:
\[ 6m = -18 \]
Finally, divide both sides by \(6\) to solve for \(m\):
\[ m = -3 \]
If you have further details to add or if the equation needs revising, please provide that context!