document.write( "Question 754761: The sum of 3 numbers is 15. The second number is double the first. The third number
\n" ); document.write( "is 5 less than the first. What are the three numbers? \n" ); document.write( "
Algebra.Com's Answer #459310 by ankor@dixie-net.com(22740)\"\" \"About 
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Write an equation for each statement
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\n" ); document.write( "The sum of 3 numbers is 15.
\n" ); document.write( "a + b + c = 15
\n" ); document.write( "The second number is double the first.
\n" ); document.write( "b = 2a
\n" ); document.write( ":
\n" ); document.write( " The third number is 5 less than the first.
\n" ); document.write( "c = (a-5)
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\n" ); document.write( " What are the three numbers?
\n" ); document.write( ":
\n" ); document.write( "In the 1st equation, replace b with 2a, replace c with (a-5)
\n" ); document.write( "a + 2a + (a-5) = 15
\n" ); document.write( "4a = 15 + 5
\n" ); document.write( "a = 20/4
\n" ); document.write( "a = 5
\n" ); document.write( "Find b
\n" ); document.write( "b = 2(5)
\n" ); document.write( "b = 10
\n" ); document.write( "find c
\n" ); document.write( "c = 5 - 5
\n" ); document.write( "c = 0
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\n" ); document.write( "Check: 5 + 10 + 0 = 15 \n" ); document.write( "
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