document.write( "Question 971426: Mona's father is thrice as old as mona after12 years she will be twice the age ofbhis daughter . Find the present \n" ); document.write( "
Algebra.Com's Answer #594003 by ankor@dixie-net.com(22740)\"\" \"About 
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let m = Mona's age
\n" ); document.write( "let f = father's age
\n" ); document.write( ":
\n" ); document.write( "Write an equation for each statement, simplify as much as possible:
\n" ); document.write( ":
\n" ); document.write( " Mona's father is thrice as old as Mona
\n" ); document.write( "f = 3m
\n" ); document.write( " after 12 years she will be twice the age of his daughter.
\n" ); document.write( "f + 12 = 2(m + 12)
\n" ); document.write( "f + 12 = 2m + 24
\n" ); document.write( "f = 2m + 24 - 12
\n" ); document.write( "f = 2m + 12
\n" ); document.write( "Replace f with 3m, from the 1st statement
\n" ); document.write( "3m = 2m + 12
\n" ); document.write( "3m - 2m = 12
\n" ); document.write( "m = 12 yrs is Mona's age
\n" ); document.write( "I'll let you find father's age from this, check your solutions in the 2nd statement. \r
\n" ); document.write( "\n" ); document.write( " Find their present ages \n" ); document.write( "
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