document.write( "Question 1123804: At the festival, you are selling hats and T-shirts. In total you sell 140 hats and t-shirts combined. Each hat costs $10 and each shirt costs $15. Your profit from selling the shirts is $1800 dollars. How many hats did you sell? How many t-shirts?
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\n" ); document.write( "At the festival, you are selling hats and T-shirts. In total you sell 140 hats and t-shirts combined. Each hat costs $10 and each shirt costs $15. Your profit from selling the shirts is $1800 dollars. How many hats did you sell? How many t-shirts?
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NOT profit, but REVENUE from sales = $1,800
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document.write( "Let number of t-shirts be T
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document.write( "Then number of hats = 140 - T
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document.write( "We then get: 15T + 10(140 - T) = 1,800
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document.write( "15T + 1,400 - 10T = 1,800
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document.write( "15T - 10T = 1,800 - 1,400
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document.write( "5T = 400
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document.write( "T, or number of t-shirts = 
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document.write( "Number of hats:  \n" );
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