document.write( "Question 118561: Find three consecutive numbers whose sum is 60. \n" ); document.write( "
Algebra.Com's Answer #86684 by bucky(2189)![]() ![]() ![]() You can put this solution on YOUR website! If the first unknown number is represented by x, then the second consecutive number must \n" ); document.write( "be one greater than x (or x + 1) and the third consecutive number must be two greater than \n" ); document.write( "x (or x + 2). The sum of the three consecutive numbers then becomes: \n" ); document.write( ". \n" ); document.write( "x + (x + 1) + (x + 2) \n" ); document.write( ". \n" ); document.write( "and this sum must equal 60. This makes the equation: \n" ); document.write( ". \n" ); document.write( "x + (x + 1) + (x + 2) = 60 \n" ); document.write( ". \n" ); document.write( "Combine all the x terms on the left side and you have: \n" ); document.write( ". \n" ); document.write( "3x + 1 + 2 = 60 \n" ); document.write( ". \n" ); document.write( "Add the 1 & 2 to get: \n" ); document.write( ". \n" ); document.write( "3x + 3 = 60 \n" ); document.write( ". \n" ); document.write( "Get rid of the +3 on the left side by subtracting 3 from both sides and the result is: \n" ); document.write( ". \n" ); document.write( "3x = 57 \n" ); document.write( ". \n" ); document.write( "Solve for x by dividing both sides of this equation by 3. Since 3 goes into 57 19 times, \n" ); document.write( "the result is: \n" ); document.write( ". \n" ); document.write( "x = 19 \n" ); document.write( ". \n" ); document.write( "And since the numbers are consecutive, the three numbers that you are looking for are: \n" ); document.write( ". \n" ); document.write( "19 and 20 and 21 \n" ); document.write( ". \n" ); document.write( "If you add these three consecutive numbers, you get a total of 60, just as the problem \n" ); document.write( "requires the sum to be. So the answer checks. \n" ); document.write( ". \n" ); document.write( "Hope this helps you to see how to set up and do the problem. \n" ); document.write( ". \n" ); document.write( " \n" ); document.write( " |