document.write( "Question 118561: Find three consecutive numbers whose sum is 60. \n" ); document.write( "
Algebra.Com's Answer #86684 by bucky(2189)\"\" \"About 
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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:
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\n" ); document.write( "x + (x + 1) + (x + 2)
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\n" ); document.write( "and this sum must equal 60. This makes the equation:
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\n" ); document.write( "x + (x + 1) + (x + 2) = 60
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\n" ); document.write( "Combine all the x terms on the left side and you have:
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\n" ); document.write( "3x + 1 + 2 = 60
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\n" ); document.write( "Add the 1 & 2 to get:
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\n" ); document.write( "3x + 3 = 60
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\n" ); document.write( "Get rid of the +3 on the left side by subtracting 3 from both sides and the result is:
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\n" ); document.write( "3x = 57
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\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:
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\n" ); document.write( "x = 19
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\n" ); document.write( "And since the numbers are consecutive, the three numbers that you are looking for are:
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\n" ); document.write( "19 and 20 and 21
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\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.
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\n" ); document.write( "Hope this helps you to see how to set up and do the problem.
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