document.write( "Question 513327: Solving equations that have the variable on both sides. I can't figure out the equation.\r
\n" ); document.write( "\n" ); document.write( "Diana has 7 more five-dollar bills than ten-dollar bills. The value of the five-dollar bills equals the value of the ten-dollar bills. How many five-dollar and ten-dollar bills does she have? \n" ); document.write( "
Algebra.Com's Answer #342957 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Diana has 7 more five-dollar bills than ten-dollar bills. The value of the five-dollar bills equals the value of the ten-dollar bills. How many five-dollar and ten-dollar bills does she have?
\n" ); document.write( "-------------
\n" ); document.write( "Quantity Equation: f = t + 7 bills
\n" ); document.write( "Value Equation: 5f = 10t dollars
\n" ); document.write( "----
\n" ); document.write( "Modify :
\n" ); document.write( "f = 2t
\n" ); document.write( "----
\n" ); document.write( "Substitute:
\n" ); document.write( "2t = t+7
\n" ); document.write( "t = 7 (# of $10 bills)
\n" ); document.write( "Solve for \"f\":
\n" ); document.write( "f = 2t
\n" ); document.write( "f = 2*7 = 14 (# of $5 bills)
\n" ); document.write( "==================================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "============ \n" ); document.write( "
\n" );