document.write( "Question 933797: Kristine is 4 years younger than Mario. Three years from now she will be two-thirds as old as Mario. Find their present age. \n" ); document.write( "
Algebra.Com's Answer #567030 by algebrahouse.com(1659)\"\" \"About 
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x = Mario's age now
\n" ); document.write( "x - 4 = Kristine's age now\r
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\n" ); document.write( "\n" ); document.write( "x + 3 = Mario's age in 3 years {added 3 on to present age}
\n" ); document.write( "x - 1 = Kristine's age in 3 years {added 3 on to present age}\r
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\n" ); document.write( "\n" ); document.write( "x - 1 = (2/3)(x + 3) {three years from now, she will be 2/3 his age}
\n" ); document.write( "3(x - 1) = 2(x + 3) {multiplied entire equation by LCD, 3, to eliminate fraction}
\n" ); document.write( "3x - 3 = 2x + 6 {used distributive property}
\n" ); document.write( "x - 3 = 6 {subtracted 2x from each side}
\n" ); document.write( "x = 9 {added 3 to each side}
\n" ); document.write( "x - 4 = 5 {substituted 9, in for x, into x - 4}\r
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\n" ); document.write( "\n" ); document.write( "Mario is 9
\n" ); document.write( "Kristine is 5
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