For a two-digit number, the number in the tens place is 1 less than the number in the ones place, and the sum of the number in the tens place and the number in the ones place is 0.2 times the two-digit number. Find the two-digit number. Solve the equation.
一个两位数，十位上的数字比个位上的数字小1，十位上的数字与个位上的数字和是这个两位数的0.2倍，求这个两位数．用方程解．
<result>45</result>