document.write( "Question 1110595: rina is twice as old as lori three years from now .the sum of their ages will be 42 how is old is.rina?
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Algebra.Com's Answer #725575 by rothauserc(4718)\"\" \"About 
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Let r be Rina's age and l be Lori's age, then
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\n" ); document.write( "1) r = 2l
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\n" ); document.write( "2) (r+3) + (l+3) = 42
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\n" ); document.write( "use equation 1 to substitute for r in equation 2
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\n" ); document.write( "(2l+3) + (l+3) = 42
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\n" ); document.write( "3l + 6 = 42
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\n" ); document.write( "3l = 36
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\n" ); document.write( "l = 12
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\n" ); document.write( "use equation 1
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\n" ); document.write( "Rina is 2 * 12 = 24 years old
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\n" ); document.write( "check the answer with equation 2
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\n" ); document.write( "(24+3) + (12+3) = 42
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\n" ); document.write( "27 + 15 = 42
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\n" ); document.write( "42 = 42
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\n" ); document.write( "our answer checks
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