document.write( "Question 1087040: A certain two-digit number is 2 less than three times the sum of its digit. If 54 is added to the number, the number would be reversed. Find the number. \n" ); document.write( "
Algebra.Com's Answer #701342 by josmiceli(19441)\"\" \"About 
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Let \"+u+\" = the units digit
\n" ); document.write( "Let \"+t+\" = the tens digit
\n" ); document.write( "----------------------------
\n" ); document.write( "(1) \"+10t+%2B+u+=+3%2A%28+t+%2B+u+%29+-+2+\"
\n" ); document.write( "(2) \"+10t+%2B+u+%2B+54+=+10u+%2B+t+\"
\n" ); document.write( "--------------------------------
\n" ); document.write( "(1) \"+10t+%2B+u+=+3t+%2B+3u+-+2+\"
\n" ); document.write( "(1) \"+7t+-+2u+=+-2+\"
\n" ); document.write( "and
\n" ); document.write( "(2) \"+9t+-+9u+=+-54+\"
\n" ); document.write( "(2) \"+t+-+u+=+-6+\"
\n" ); document.write( "-----------------------------
\n" ); document.write( "Multiply both sides of (2) by \"+2+\"
\n" ); document.write( "and subtract (2) from (1)
\n" ); document.write( "(1) \"+7t+-+2u+=+-2+\"
\n" ); document.write( "(2) \"+-2t+%2B+2u+=+12+\"
\n" ); document.write( "--------------------------
\n" ); document.write( "\"+5t+=+10+\"
\n" ); document.write( "\"+t+=+2+\"
\n" ); document.write( "and
\n" ); document.write( "(2) \"+t+-+u+=+-6+\"
\n" ); document.write( "(2) \"+2+-+u+=+-6+\"
\n" ); document.write( "(2) \"+-u+=+-8+\"
\n" ); document.write( "(2) \"+u+=+8+\"
\n" ); document.write( "--------------------
\n" ); document.write( "The number is 28
\n" ); document.write( "--------------------
\n" ); document.write( "check:
\n" ); document.write( "3 times the sum of it's digits:
\n" ); document.write( "\"+3%2A%28+2+%2B+8+%29+=+30+\"
\n" ); document.write( "\"+30+-+2+=+28+\"
\n" ); document.write( "OK
\n" ); document.write( "Add 54 to the number:
\n" ); document.write( "\"+28+%2B+54+=+82+\"
\n" ); document.write( "The number is reversed
\n" ); document.write( "OK\r
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