document.write( "Question 1133388: Karen is twice as old as Lori. Three years from now, the sum of their ages will be 42. How old is Karen? \n" ); document.write( "

Algebra.Com's Answer #750588 by math_helper(2461) $\"\"$ $\"About$

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L = Lori's age
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document.write( "1.  K = 2L\r\n" );
document.write( "2.  (K+3) + (L+3) = 42\r\n" );
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\n" ); document.write( "\n" ); document.write( "Re-writing (2) w/substitution for L (L=(1/2)K):
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document.write( "2'.  (K+3) + ((1/2)K+3) = 42\r\n" );
document.write( "     (3/2)K = 36\r\n" );
document.write( "          K = (2/3)(36) = 24\r\n" );
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\n" ); document.write( "Ans: $\"+highlight%28+K=24+%29+\"$
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\n" ); document.write( " K=24 --> L=12\r
\n" ); document.write( "\n" ); document.write( "In three years: 24+3 + 12+3 = 27 + 15 = 42 (ok)\r
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