document.write( "Question 623431: combine like terms : 17a +21a \n" ); document.write( "
Algebra.Com's Answer #392098 by jim_thompson5910(35256)\"\" \"About 
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Add the coefficients: 17+21 = 38\r
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\n" ); document.write( "\n" ); document.write( "So 17a + 21a = 38a
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