document.write( "Question 854786: I think of a pair of numbers. If i add 11 to the first, ibobtain a number which is twice the second. If i add 20 to the second, i obtain a number which is twice the first. What are the numbers? \n" ); document.write( "
Algebra.Com's Answer #515060 by ankor@dixie-net.com(22740)\"\" \"About 
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I think of a pair of numbers.
\n" ); document.write( "a & b
\n" ); document.write( " If i add 11 to the first, i obtain a number which is twice the second.
\n" ); document.write( "a + 11 = 2b
\n" ); document.write( "a = 2b - 11
\n" ); document.write( "If i add 20 to the second, i obtain a number which is twice the first.
\n" ); document.write( "b + 20 = 2a
\n" ); document.write( "Replace a with (2b-11)
\n" ); document.write( "b + 20 = 2(2b-11)
\n" ); document.write( "b + 20 = 4b - 22
\n" ); document.write( "20 + 22 = 4b - b
\n" ); document.write( "42 = 3b
\n" ); document.write( "b = 42/3
\n" ); document.write( "b = 14
\n" ); document.write( "I'll let you find a, check your solutions in both statements\r
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\n" ); document.write( "\n" ); document.write( " What are the numbers?\r
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