document.write( "Question 513424: In 1985 Maria was three times as old as Sue. Five years earlier, the sum of their ages was eighteen. In what year was Maria born? \n" ); document.write( "
Algebra.Com's Answer #344098 by Maths68(1474)\"\" \"About 
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\n" ); document.write( "In 1985
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\n" ); document.write( "Maria was = m years old
\n" ); document.write( "Sue was = s years old
\n" ); document.write( "Maria was three times as old as Sue
\n" ); document.write( "m=3s........(1)\r
\n" ); document.write( "\n" ); document.write( "1980
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\n" ); document.write( "Five years earlier
\n" ); document.write( "(s-5)+(m-5)=18
\n" ); document.write( "s-5+m-5=18
\n" ); document.write( "s+m-10=18
\n" ); document.write( "s+m=18+10
\n" ); document.write( "s+m=28.......(2)\r
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\n" ); document.write( "\n" ); document.write( "Put the value of m from (1) to (2)
\n" ); document.write( "s+(3s)=28
\n" ); document.write( "s+3s=28
\n" ); document.write( "4s=28
\n" ); document.write( "4s/4=28/4
\n" ); document.write( "s=7\r
\n" ); document.write( "\n" ); document.write( "Put the value of s in (1)\r
\n" ); document.write( "\n" ); document.write( "m=3s
\n" ); document.write( "m=3(7)
\n" ); document.write( "m=21
\n" ); document.write( "In 1985
\n" ); document.write( "Maria was = m = 21 years old
\n" ); document.write( "Sue was = s = 7 = years old\r
\n" ); document.write( "\n" ); document.write( "Maira was born in = 1985 - 21 = 1964
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