document.write( "Question 379084: solve.\r
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document.write( "the cost of admission to the spring carnival was $50 for a group of 9 children and 2 adults. the admission was $61 for another group of 10 children and 3 adults. what was the admission price for each child? what was the admission price for each adult?\r
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document.write( "this is what i have so far, im stuck.\r
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document.write( "children=c adults=a\r
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document.write( "$50=9c+2a
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document.write( "$61=10c+3a \n" );
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Algebra.Com's Answer #269320 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! the cost of admission to the spring carnival was $50 for a group of 9 children and 2 adults. \n" ); document.write( " the admission was $61 for another group of 10 children and 3 adults. \n" ); document.write( " what was the admission price for each child? \n" ); document.write( "what was the admission price for each adult? \n" ); document.write( ": \n" ); document.write( "I would write it like this (but your way is OK too) \n" ); document.write( "9c + 2a = 50 \n" ); document.write( "10c + 3a = 61 \n" ); document.write( ": \n" ); document.write( "To use elimination, multiply the 1st equation by 3, the 2nd equation by 2: \n" ); document.write( "27c + 6a = 150 \n" ); document.write( "20c + 6a = 122 \n" ); document.write( "----------------Subtraction eliminates a, find c \n" ); document.write( "7c = 28 \n" ); document.write( "c = \n" ); document.write( "c = $4 for children \n" ); document.write( ": \n" ); document.write( "Use the 1st original equation to find a, replace c with 4 \n" ); document.write( "9c + 2a = 50 \n" ); document.write( "9(4) + 2a = 50 \n" ); document.write( "36 + 2a = 50 \n" ); document.write( "2a = 50 - 36 \n" ); document.write( "2a = 14 \n" ); document.write( "a = \n" ); document.write( "a = $7 for adults \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "We can check these solutions in the 2nd original equation \n" ); document.write( "10c + 3a = 61 \n" ); document.write( "10(4) + 3(7) = 61 \n" ); document.write( "40 + 21 = 61, confirms our solution \n" ); document.write( ": \n" ); document.write( "How about this, did it make sense to you now? \n" ); document.write( " |