document.write( "Question 1134521: Twin​ brothers, Billy and​ Bobby, can mow their​ grandparent's lawn together in 76 minutes. Billy could mow the lawn by himself in 35 minutes less time that it would take Bobby. How long would it take Bobby to mow the lawn by​ himself? \n" ); document.write( "
Algebra.Com's Answer #751936 by ikleyn(52786)\"\" \"About 
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document.write( "Let x be that time for Bobby (the value under the problem's question).\r\n" );
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document.write( "Then the time for Billy alone is  (x-35) minutes.\r\n" );
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document.write( "Now,   Bobby makes  \"1%2Fx\"  of the job per minute,\r\n" );
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document.write( "while  Billy makes  \"1%2F%28x-35%29\"  of the job per minute.\r\n" );
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document.write( "Working together,  they make  \"1%2Fx\" + \"1%2F%28x-35%29\"  of the job per minute.\r\n" );
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document.write( "Their combined rate is exactly  \"1%2F76\"  of the total job, which gives you an equation\r\n" );
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document.write( "    \"1%2Fx\" + \"1%2F%28x-35%29\" = \"1%2F76\",      (1)\r\n" );
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document.write( "and now it is your job to solve it !\r\n" );
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document.write( "The first step in solving is to multiply both sides of the equation (1)  by  76*x*(x-35).\r\n" );
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document.write( "You will get a quadratic equation then, and I wish you to get a full success in solving it !\r\n" );
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\n" ); document.write( "\n" ); document.write( "Happy calculations !\r
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\n" ); document.write( "\n" ); document.write( "To see many similar solved problems,  look into the lesson\r
\n" ); document.write( "\n" ); document.write( "    - Using quadratic equations to solve word problems on joint work \r
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\n" ); document.write( "\n" ); document.write( "Also,  you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lesson is the part of this textbook under the topic
\n" ); document.write( "\"Rate of work and joint work problems\"  of the section  \"Word problems\".\r
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\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I
\n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
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