document.write( "Question 931668: Manuel is 8 years older than his sister. 3 years ago he was 3 times older than his sister. How old are they now \n" ); document.write( "
Algebra.Com's Answer #565717 by ewatrrr(24785)\"\" \"About 
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x sister's age. Manual (x+8)
\n" ); document.write( ".......
\n" ); document.write( "3 years ago..
\n" ); document.write( "(x+8) - 3 = 3(x-3)
\n" ); document.write( "x + 5 = 3x - 9
\n" ); document.write( "14 = 2x
\n" ); document.write( "7 = x, sister's age . Manual is 15 \"7%2B8\"
\n" ); document.write( "And checking...3 years ago
\n" ); document.write( "12 = 3(4)
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