document.write( "Question 134137: the sum of the last two digits of a three digit counting number is 7. the sum of the first two digits is 5. the middle digit is 4 times the first digit. what is the number? \n" ); document.write( "
Algebra.Com's Answer #98097 by solver91311(24713)![]() ![]() You can put this solution on YOUR website! Three digit number, so the digits are h for hundreds, t for tens, and o for ones.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The sum of the last two digits is 7: \n" ); document.write( "The sum of the first two digits is 5: \n" ); document.write( "The middle digit is 4 times the first digit: \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "We can substitute \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Knowing that \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Knowing that \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Therefore the number is 143.\r \n" ); document.write( "\n" ); document.write( "4 + 3 = 7 \n" ); document.write( "4 + 1 = 5, and \n" ); document.write( "4 = 4(1)\r \n" ); document.write( "\n" ); document.write( "Answer checks.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |