document.write( "Question 772773: the sum of the ages of a mother & her daughter is 60 years.12 years ago the mother was eight times as old as her daughter.how old is the daughter now? \n" ); document.write( "
Algebra.Com's Answer #471107 by malglu(63)\"\" \"About 
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let age mum now be m
\n" ); document.write( "age daughter now =d\r
\n" ); document.write( "\n" ); document.write( "1)m+d=60\r
\n" ); document.write( "\n" ); document.write( "2)m-12 = 8(d-12)
\n" ); document.write( "m-12 =8d -96
\n" ); document.write( "rearrange to make
\n" ); document.write( "m=8d-84\r
\n" ); document.write( "\n" ); document.write( "substitute this into the first equation to make\r
\n" ); document.write( "\n" ); document.write( "8d-84+d=60
\n" ); document.write( "rearrange and solve
\n" ); document.write( "9d-84=60
\n" ); document.write( "9d=144
\n" ); document.write( "d=16
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