document.write( "Question 770112: A man was 30 years old when his son was born. The father's age is 6 years greater than 3 times the son's age. How old is each at present? Please help me solve this question...thank you! \n" ); document.write( "

Algebra.Com's Answer #469278 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+f+\"$ = the father's age now
\n" ); document.write( "The difference in their ages will
\n" ); document.write( "always be $\"+30+\"$ years, so
\n" ); document.write( " $\"+f+-+30+\"$ = the son's age now
\n" ); document.write( "---------------------------
\n" ); document.write( " $\"+f+=+3%2A%28+f+-+30+%29+%2B+6+\"$
\n" ); document.write( " $\"+f+=+3f+-+90+%2B+6+\"$
\n" ); document.write( " $\"+2f+=+90+-+6+\"$
\n" ); document.write( " $\"+2f+=+84+\"$
\n" ); document.write( " $\"+f+=+42+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+s+=+42+-+30+\"$
\n" ); document.write( " $\"+s+=+12+\"$
\n" ); document.write( "The father is 42 and the son is 12
\n" ); document.write( "-----------
\n" ); document.write( "check:
\n" ); document.write( " $\"+f+=+3%2A%28+f+-+30+%29+%2B+6+\"$
\n" ); document.write( " $\"+42+=+3%2A%28+42+-+30+%29+%2B+6+\"$
\n" ); document.write( " $\"+42+=+3%2A12+%2B+6+\"$
\n" ); document.write( " $\"+42+=+42+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

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