document.write( "Question 741163: Set up and solve by either substitution or elimination.
\n" );
document.write( "Janet wishes to mix 30 pounds of coffee to sell for $6.00 a pound. To obtain the mixture, she will mmix coffee that sells for $5 a pound with coffee that sells for $7 a pound. How many pounds of each type of coffee should she use?\r
\n" );
document.write( "\n" );
document.write( "Having a really hard time with this one. \n" );
document.write( "
Algebra.Com's Answer #451871 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Janet wishes to mix 30 pounds of coffee to sell for $6.00 a pound. To obtain the mixture, she will mmix coffee that sells for $5 a pound with coffee that sells for $7 a pound. How many pounds of each type of coffee should she use? \n" ); document.write( "---------- \n" ); document.write( "Equation: \n" ); document.write( "value + value = value \n" ); document.write( "5x + 7(30-x) = 6*30 \n" ); document.write( "------- \n" ); document.write( "5x + 7*30 - 7x = 6*30 \n" ); document.write( "-2x = -1*30 \n" ); document.write( "---- \n" ); document.write( "x = 15 lbs (amt. of $5.00 coffee needed) \n" ); document.write( "--- \n" ); document.write( "30-x = 15 lbs (amt. of $7.00 coffee needed) \n" ); document.write( "============== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "============== \n" ); document.write( " |