Let x be the digit in the tens place and y be the digit in the ones place. so, the digit is xy <span> The ten's digit of a two digit number is 1 more than 4 times the units' digit. </span>x = 4y + 1
<span>63 is subtracted from the number, the order of the digits is reversed </span>10x + y - 63 = 10y + x 9x - 9y = 63