document.write( "Question 27822: If 5 is added to a number, the result is the same as that obtained by multiplying it reciprocal by 14. What is the number? \n" ); document.write( "
Algebra.Com's Answer #15156 by bmauger(101)\"\" \"About 
You can put this solution on YOUR website!
If 5 is added to a number (5+x), the result is the same as (equals) that obtained by multiplying its reciprocal (1/x) by 14 (times 14). What is the number?\r
\n" ); document.write( "\n" ); document.write( "\"5%2Bx=%281%2Fx%29%2A14\"
\n" ); document.write( "\"5%2Bx=14%2Fx\"Multiply all terms by x:
\n" ); document.write( "\"5x%2Bx%5E2=14\"Rearrange:
\n" ); document.write( "\"x%5E2%2B5x=14\"Solving by completing the square (adding (5/2)^2 to both sides):
\n" ); document.write( "\"x%5E2%2B5x%2B%285%2F2%29%5E2=14%2B%285%2F2%29%5E2\"
\n" ); document.write( "\"%28x%2B5%2F2%29%5E2=81%2F4\"
\n" ); document.write( "\"x%2B5%2F2=+0+%2B-sqrt%2881%2F4%29\"(Ignore the 0, just makes the equation editor work)
\n" ); document.write( "\"x%2B5%2F2=+0+%2B-+9%2F2\" (Again, ignore the 0)
\n" ); document.write( "\"x=-5%2F2%2B-+9%2F2\"
\n" ); document.write( "\"x=%28-5%2B-+9%29%2F2\"
\n" ); document.write( "So x = \"%28-5%2B9%29%2F2\"=2 or \"%28-5-9%29%2F2\"=-7\r
\n" ); document.write( "\n" ); document.write( "If 5 is added to 2, the result (7) is the same as its reciprocal (1/2) multiplied by 14 (1/2*14=7) Check.
\n" ); document.write( "If 5 is added to -7 the result (-2) is the same as its reciprocal (-1/7) multiplied by 14 (-1/7*14=-2) Check.
\n" ); document.write( "
\n" );