To simplify the expression \( 14y - 6 + 3(4y + 7) \), follow these steps in order:
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Start with the given expression: \[ 14y - 6 + 3(4y + 7) \]
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Distribute the 3 into the parentheses: \[ 14y - 6 + (3 \cdot 4y) + (3 \cdot 7) \] This simplifies to: \[ 14y - 6 + 12y + 21 \]
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Combine like terms (the \(y\) terms and the constant terms):
- Combine \(14y\) and \(12y\): \[ 14y + 12y = 26y \]
- Combine \(-6\) and \(21\): \[ -6 + 21 = 15 \]
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Write the final simplified expression: \[ 26y + 15 \]
So the final answer is: \[ \boxed{26y + 15} \]