document.write( "Question 1027172: Bob and Regina have 36 coins that are nickels and dimes. If the value of the coins is $2.90 how many coins of each type do they have? \n" ); document.write( "
Algebra.Com's Answer #642436 by addingup(3677)![]() ![]() You can put this solution on YOUR website! n+d = 36 subtract d from both sides \n" ); document.write( "n = 36-d We'll use this value for n next \n" ); document.write( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ \n" ); document.write( "0.05n+0.10d = 2.90 substitute for n \n" ); document.write( "0.05(36-d)+0.10d = 2.90 \n" ); document.write( "1.80-0.05d+0.10d = 2.90 \n" ); document.write( "0.05d = 1.10 \n" ); document.write( "d = 22 \n" ); document.write( "n = 36-22 = 14 \n" ); document.write( "~~~~~~~~~~~~~~~~~~~~~~~ \n" ); document.write( "Check: \n" ); document.write( "d= 22 = 2.20 \n" ); document.write( "n= 14 = 0.70 \n" ); document.write( ". . . .------ \n" ); document.write( "Total . :2.90 Correct \n" ); document.write( " \n" ); document.write( " |