Will place 12 cubby on the right side of the bed balance he plays three cubes on the left side then he added 14 cubes on the left side find the number of cubes he must add to the right side to balance the pans

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?

What is the rest of the question?