To simplify the expression \( x + x + x + x + 2 + 7 \):
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Combine the \( x \) terms: \[ x + x + x + x = 4x \]
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Combine the constant terms: \[ 2 + 7 = 9 \]
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Now, combine both results: \[ 4x + 9 \]
Thus, the simplified expression is \( 4x + 9 \).