document.write( "Question 252642: Marivic is 20 years older than Fe. Seven years from now , Marivic will be thrice as old as Fe. Find Their present ages \n" ); document.write( "
Algebra.Com's Answer #184734 by ankor@dixie-net.com(22740)\"\" \"About 
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Write an equation for each statmente
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\n" ); document.write( "Marivic is 20 years older than Fe.
\n" ); document.write( "m = f + 20
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\n" ); document.write( " Seven years from now , Marivic will be thrice as old as Fe.
\n" ); document.write( "m + 7 = 3(f+7)
\n" ); document.write( "m + 7 = 3f + 21
\n" ); document.write( "m = 3f + 21 - 7
\n" ); document.write( "m = 3f + 14
\n" ); document.write( "Substitute (f+20) from the 1st statement:
\n" ); document.write( "f + 20 = 3f + 14
\n" ); document.write( "20 - 14 = 3f - f
\n" ); document.write( "6 = 2f
\n" ); document.write( "f = 3 yrs
\n" ); document.write( "and
\n" ); document.write( "m = 23 yrs
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\n" ); document.write( "Check solution in the statement:
\n" ); document.write( "\"Seven years from now , Marivic will be thrice as old as Fe. \"
\n" ); document.write( "23 + 7 = 3(3 + 7) \n" ); document.write( "
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