To simplify the expression \((6b + 4r) - (2b + r)\), we start by distributing the negative sign across the second set of parentheses:
\[ (6b + 4r) - (2b + r) = 6b + 4r - 2b - r \]
Next, we combine like terms:
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Combine the terms with \(b\): \[ 6b - 2b = 4b \]
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Combine the terms with \(r\): \[ 4r - r = 3r \]
Now, we put it all together:
\[ 4b + 3r \]
So, the simplified expression is:
\[ \boxed{4b + 3r} \]