document.write( "Question 1092811: One-fourth of Eric's age last year plus triple his age next year is 84. How old is Eric? \n" ); document.write( "

Algebra.Com's Answer #707426 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+x+\"$ = Eric's age now
\n" ); document.write( " $\"+x+-+1+\"$ = his age last year
\n" ); document.write( " $\"+x+%2B+1+\"$ = his age next year
\n" ); document.write( "------------------------------
\n" ); document.write( " $\"+%281%2F4%29%2A%28+x+-+1+%29+%2B+3%2A%28+x+%2B+1+%29+=+84+\"$
\n" ); document.write( " $\"+%281%2F4%29%2Ax+-+1%2F4+%2B+3x+%2B+3+=+84+\"$
\n" ); document.write( " $\"+%28+13%2F4+%29%2Ax+-+1%2F4+=+81+\"$
\n" ); document.write( "Multiply both sides by $\"+4+\"$
\n" ); document.write( " $\"+13x+-1+=+324+\"$
\n" ); document.write( " $\"+13x+=+325+\"$
\n" ); document.write( " $\"+x+=+25+\"$
\n" ); document.write( "Eric is 25
\n" ); document.write( "----------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+%281%2F4%29%2A%28+x+-+1+%29+%2B+3%2A%28+x+%2B+1+%29+=+84+\"$
\n" ); document.write( " $\"+%281%2F4%29%2A%28+25+-+1+%29+%2B+3%2A%28+25+%2B+1+%29+=+84+\"$
\n" ); document.write( " $\"+%281%2F4%29%2A24+%2B+3%2A26+=+84+\"$
\n" ); document.write( " $\"+6+%2B+78+=+84+\"$
\n" ); document.write( " $\"+84+=+84+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

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