document.write( "Question 1059955: Sally is 8 years older than john. John is 14 years older than Karen. If the sum of their ages is 90, how old are they? \n" ); document.write( "
Algebra.Com's Answer #675003 by ikleyn(52787)\"\" \"About 
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\n" ); document.write( "Sally is 8 years older than john. John is 14 years older than Karen. If the sum of their ages is 90, how old are they?
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document.write( "Let K be the Karen's age.\r\n" );
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document.write( "Then the John's age is (K+14) years, and Sally's age is (K+14)+8 = K + 22 years.\r\n" );
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document.write( "As the condition says, the sum of ages is 90, which gives you an equation\r\n" );
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document.write( "K + (K+14) + (K+22) = 90.\r\n" );
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document.write( "Simplify and solve for K:\r\n" );
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document.write( "3K + 36 = 90,\r\n" );
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document.write( "3K = 90 - 36,\r\n" );
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document.write( "3K = 54,\r\n" );
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document.write( "K = \"54%2F3\" = 18.\r\n" );
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document.write( "Answer. Karen is 18 years old. John is 18+14 = 32 years old. Sally is 32+8 = 40 years old.\r\n" );
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\n" ); document.write( "\n" ); document.write( "The lesson to learn from this solution:\r
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\n" ); document.write( "\n" ); document.write( "1.  First choose the major unknown reasonably.\r
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\n" ); document.write( "\n" ); document.write( "2.  Second, express other unknowns via the major unknown.\r
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\n" ); document.write( "\n" ); document.write( "3.  Then make an equation.\r
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\n" ); document.write( "\n" ); document.write( "4.  Then solve the equation.\r
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\n" ); document.write( "\n" ); document.write( "It is the algorithm.\r
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