document.write( "Question 30777: alter working 4 hours, frank has made 21 machine parts. at the same rate, how many parts can he make in 7 hours? \n" ); document.write( "
Algebra.Com's Answer #17537 by checkley71(8403)\"\" \"About 
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4/7=21/X OR 4X=147 OR X=147/4 OR X=36.75 \n" ); document.write( "
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