document.write( "Question 845920: A woman is three times as old as her daughter. In four years time she will be two and a half times as old as her daughter. What is the woman's present age?\r
\n" ); document.write( "\n" ); document.write( "m=3X d=x
\n" ); document.write( "+4 yrs
\n" ); document.write( "m=3x+4*2.5 d=x+4
\n" ); document.write( "as far as I got with my daughter's maths question?? any ideas \n" ); document.write( "

Algebra.Com's Answer #509483 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+m+\"$ = mom's age now
\n" ); document.write( "Let $\"d+\"$ = Daughter's age now
\n" ); document.write( " $\"+m+%2B+4+\"$ = mom's age in 4 years
\n" ); document.write( " $\"+d+%2B+4+\"$ = daughter's age in 4 years
\n" ); document.write( "---------------------------------------------
\n" ); document.write( "(1) $\"+m+=+3d+\"$
\n" ); document.write( "(2) $\"+m+%2B+4+=+2.5%2A%28+d+%2B+4+%29+\"$
\n" ); document.write( "Substitute (1) into (2)
\n" ); document.write( "(2) $\"+3d+%2B+4+=+2.5d+%2B+10+\"$
\n" ); document.write( "(2) $\"+.5d+=+10+-+4+\"$
\n" ); document.write( "(2) $\"+.5d+=+6+\"$
\n" ); document.write( "(2) $\"+d+=+12+\"$
\n" ); document.write( "and
\n" ); document.write( "(1) $\"+m+=+3d+\"$
\n" ); document.write( "(1) $\"+m+=+36+\"$
\n" ); document.write( "Mom is 36
\n" ); document.write( "Daughter is 12
\n" ); document.write( "check:
\n" ); document.write( "(2) $\"+m+%2B+4+=+2.5%2A%28+d+%2B+4+%29+\"$
\n" ); document.write( "(2) $\"+36+%2B+4+=+2.5%2A%28+12+%2B+4+%29+\"$
\n" ); document.write( "(2) $\"+40+=+2.5%2A16+\"$
\n" ); document.write( "(2) $\"+40+=+40+\"$
\n" ); document.write( "OK\r
\n" ); document.write( "
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