Help please with these 2 equations (also we’re supposed to solve them using the elimination method I believe, and turn the picture the side idk why it’s sideways like that)

The answer would be 484

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?