document.write( "Question 1121510: Helping my grandson with some home work. I’m 60 years old and have not spent much time with algebra. Here’s the question. Brian has $50. He buys 20 similar books and has x dollars left. What is the cost of each book? \n" ); document.write( "

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\n" ); document.write( "Helping my grandson with some home work. I’m 60 years old and have not spent much time with algebra. Here’s the question. Brian has $50. He buys 20 similar books and has x dollars left. What is the cost of each book?
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Let cost of each book be B
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document.write( "Then total cost of books = 20B 
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document.write( "Also, total cost of books = 50 - x
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document.write( "We then get: 20B = 50 - x
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document.write( "Cost of each book, or  \n" );
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