document.write( "Question 1160367: A lawyer invested a certain amount of money in a restaurant business, expecting the earnings to be 9% per year. He invested thrice the amount in a retail business, expecting the earnings to be 11% per year. If after a year, the total interest from the investment is 63,000, how much did he invest in the restaurant business? \n" ); document.write( "

Algebra.Com's Answer #783660 by MathTherapy(10552) $\"\"$ $\"About$

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\n" ); document.write( "A lawyer invested a certain amount of money in a restaurant business, expecting the earnings to be 9% per year. He invested thrice the amount in a retail business, expecting the earnings to be 11% per year. If after a year, the total interest from the investment is 63,000, how much did he invest in the restaurant business?
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Let amount invested in the restaurant business be R 
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document.write( "Then amount invested in the retail business, is 3R
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document.write( "We then get: .09R + .11(3R) = 63,000
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document.write( ".09R + .33R = 63,000
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document.write( ".42R = 63,000
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document.write( "Amount invested in the restaurant business, or  \n" );
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