document.write( "Question 996701: What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first and second, and the last is three times the second? \n" ); document.write( "
Algebra.Com's Answer #615179 by ankor@dixie-net.com(22740)\"\" \"About 
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What is the four-digit number
\n" ); document.write( "a, b, c, d
\n" ); document.write( "in which the first digit is one-third the second,
\n" ); document.write( "a = \"1%2F3\"b
\n" ); document.write( ":
\n" ); document.write( " the third is the sum of the first and second,
\n" ); document.write( "c = a + b
\n" ); document.write( "replace a with \"1%2F3\"b
\n" ); document.write( "c = \"1%2F3\"b + b
\n" ); document.write( "c = \"4%2F3\"b
\n" ); document.write( "Because we must have single digit integer solution, only two are possible
\n" ); document.write( "b=3 then c=4, and b=6, then c=8
\n" ); document.write( ":
\n" ); document.write( " and the last is three times the second?
\n" ); document.write( "d = 3b
\n" ); document.write( "From this we know that b is 3 or less to be single digit
\n" ); document.write( "therefore, from the last two statements:
\n" ); document.write( "b = 3, resulting in c=4
\n" ); document.write( "and
\n" ); document.write( "a = \"1%2F3\"(3) = 1
\n" ); document.write( "and
\n" ); document.write( "d = 3(3) = 9
\n" ); document.write( ":
\n" ); document.write( "Our number: 1349
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