document.write( "Question 212377This question is from textbook holt mathematics practice book
\n" ); document.write( ": twice the sum of a number and 600 \n" ); document.write( "
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Let the unknown number be x
\n" ); document.write( "Then the sum of the number and 600 can be expressed as x + 600.
\n" ); document.write( "therefore twice the sum of the number and 600 is 2(x+600).
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