document.write( "Question 1040278: The sum of one-fifth of Lucy's age and one-seventh of her age is 12. Use algebra to workout her age. Plz help \n" ); document.write( "
Algebra.Com's Answer #655094 by jorel555(1290)\"\" \"About 
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Let n be Lucy's age. Then
\n" ); document.write( "n/5+n/7=12
\n" ); document.write( "7n+5n=420
\n" ); document.write( "n=420/12=35 ☺☺☺
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