document.write( "Question 1104545: Twice the sum of jerry and David’s age is equivalent to ten years less than three times franks age. David is 9 Year’s younger than jerry and frank is 5 Year’s older than jerry. Write and solve an algebraic equation to find the ages of all the men. \n" ); document.write( "

Algebra.Com's Answer #719249 by josgarithmetic(39621) $\"\"$ $\"About$

You can put this solution on YOUR website!
Assign variables and translate the description into equations literally. Solve the system of equations.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "j, Jerry
\n" ); document.write( "d, David
\n" ); document.write( "f, Frank\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"system%282%28j%2Bd%29=-10%2B3f%2Cd=j-9%2Cf=j%2B5%29\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Check how the description corresponds to the equations.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Before trying to solve, notice very carefully how d is a formula in terms of j and that f is a formula in terms of j. This will allow a substitution to give you one equation in one unknown variable, j. \n" ); document.write( "

\n" );