document.write( "Question 348932: -3/4 +2/5 \n" ); document.write( "
Algebra.Com's Answer #249426 by Alan3354(69443)\"\" \"About 
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-3/4 +2/5
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\n" ); document.write( "Find a common denominator. The product always works, even if it's not the LCD (Least Common Denominator). Schools are obesessed with the LCD for no good reason.
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\n" ); document.write( "4*5 = 20, the common denominator (also the LCD)
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\n" ); document.write( "-3/4 +2/5 = -15/20 + 8/20
\n" ); document.write( "= (-15 + 8)/20
\n" ); document.write( "= -7/20\r
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