document.write( "Question 318765: 1. Sam is 10 years older than Jack. Twice Sam's age subtracted from 6 times Jack's age is 7 more than Jack's age. Find Jack and Sam's age.\r
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document.write( "2. Separate 65 into two parts such that 3 times the larger will be 6 more than 6 times the smaller. (HINT: let x and 65-x represent your two numbers)\r
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document.write( "3. Gill has $3.75 is quarters, dimes, and nickels. He has twice as many quarters as dimes and three more dimes than nickels. Find how much of each coin Bill has. \n" );
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Algebra.Com's Answer #228184 by stanbon(75887) ![]() You can put this solution on YOUR website! 1. Sam is 10 years older than Jack. Twice Sam's age subtracted from 6 times Jack's age is 7 more than Jack's age. Find Jack and Sam's age. \n" ); document.write( "---- \n" ); document.write( "Equations: \n" ); document.write( "s = j+10 \n" ); document.write( "6j-2s = j+7 \n" ); document.write( "------------------ \n" ); document.write( "Substitute for \"s\" and solve for \"j\". \n" ); document.write( "========================================== \n" ); document.write( " \n" ); document.write( "2. Separate 65 into two parts such that 3 times the larger will be 6 more than 6 times the smaller. (HINT: let x and 65-x represent your two numbers) \n" ); document.write( "--- \n" ); document.write( "Equation: \n" ); document.write( "You don't know which is larger so use either as the largest. \n" ); document.write( "3x =6(65-x)+6 \n" ); document.write( "========================================== \n" ); document.write( " \n" ); document.write( "3. Gill has $3.75 is quarters, dimes, and nickels. He has twice as many quarters as dimes and three more dimes than nickels. Find how much of each coin Bill has. \n" ); document.write( "----------------------- \n" ); document.write( "Equations: \n" ); document.write( "q = 2d \n" ); document.write( "d = n+3 \n" ); document.write( "5n + 10d + 25q = 375 cents \n" ); document.write( "-- \n" ); document.write( "Substitute for \"d\" and for \"n\" and solve for \"q\": \n" ); document.write( "d = q/2 \n" ); document.write( "n = d-3 = (q/2)-3 \n" ); document.write( "----------------------- \n" ); document.write( "5[(q/2)-3] + 10(q/2) + 25q = 375 \n" ); document.write( "(5/2)q - 15 + 5q + 25q = 375 \n" ); document.write( "--- \n" ); document.write( "Multiply thru by 2 to get: \n" ); document.write( "5q - 30 + 60q = 750 \n" ); document.write( "65q = 780 \n" ); document.write( "q = 12 \n" ); document.write( "d = 6 \n" ); document.write( "n = 3 \n" ); document.write( "--------------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "=========================== \n" ); document.write( " |