The quotient of a two-digit number divided by the sum of its digit is 4.
If the number is subtracted from the sum of the squares of its digits, the difference is 9.
Find the number.
5t+3=0; t-3=0
5t=-3; t=3
t=-3/5;
Only t=3 can be a digit, so ignore -3/5
Substitute in
2t=u
2(3)=u
6=u
So the tens digit is 3 and the units digit is 6,
so the answer is 36.
Edwin