document.write( "Question 717347: write the missing digit to make each number divisible by 9 \r
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Algebra.Com's Answer #454750 by tommyt3rd(5050)\"\" \"About 
You can put this solution on YOUR website!
It is well known that if the digits of a number add to a multiple of 9 then so does the number. We look for a 1-digit number such that\r
\n" ); document.write( "\n" ); document.write( "7+blank+1 adds to a multiple of 9\r
\n" ); document.write( "\n" ); document.write( "Since our number is 1-digit we need to use 1\r
\n" ); document.write( "\n" ); document.write( "711/9=79\r
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