The sum of digits of a cetain two - digit number is 7. reversing its digits increases the by the number nine. what is the number? you must use an algebraic expression to solve.

The number is 34.
3 + 4 = 7
43 - 34 = 9

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?