document.write( "Question 118135: Four times a number is three times the difference between thirty five and the number. Find the number. \n" ); document.write( "
Algebra.Com's Answer #86245 by bucky(2189)![]() ![]() ![]() You can put this solution on YOUR website! Let x represent the unknown number. \n" ); document.write( ". \n" ); document.write( "What is 4 times that number? It is 4 times x or 4x for short. \n" ); document.write( ". \n" ); document.write( "What is the difference between 35 and the number? It is 35 - x. And what is 3 times that \n" ); document.write( "difference? It is 3(35 - x). \n" ); document.write( ". \n" ); document.write( "The problem says that 4 times the number (4x) is equal to 3 times the difference between \n" ); document.write( "35 and the number ... 3(35 - x) \n" ); document.write( ". \n" ); document.write( "So set these two quantities equal: \n" ); document.write( ". \n" ); document.write( "4x = 3(35 - x) \n" ); document.write( ". \n" ); document.write( "On the right side do the distributed multiplication by multiplying 3 times each of the \n" ); document.write( "terms inside the parentheses. When you do that multiplication the equation becomes: \n" ); document.write( ". \n" ); document.write( "4x = 105 - 3x \n" ); document.write( ". \n" ); document.write( "Get rid of the -3x on the right side by adding 3x to both sides. On the right side the \n" ); document.write( "-3x and the 3x being added cancel each other out. On the left side the 4x plus 3x becomes \n" ); document.write( "7x ... so the equation is then: \n" ); document.write( ". \n" ); document.write( "7x = 105 \n" ); document.write( ". \n" ); document.write( "Solve for x by dividing both sides of this equation by 7 and you get: \n" ); document.write( ". \n" ); document.write( "x = 15 \n" ); document.write( ". \n" ); document.write( "The number that you were asked to find is 15. \n" ); document.write( ". \n" ); document.write( "Check ... 4 time that number is 4 times 15 and that is 60. The difference between 35 and \n" ); document.write( "the number is 35 - 15 and that is 20. And 3 times that number is 60. This tells you that \n" ); document.write( "4 times the number does equal 3 times the difference between 35 and the number. So the answer \n" ); document.write( "is correct. The unknown number does equal 15. \n" ); document.write( ". \n" ); document.write( "Hope this helps you to understand the problem and how to solve it. \n" ); document.write( ". \n" ); document.write( "Have a Happy New Year ... \n" ); document.write( ". \n" ); document.write( " |