Which pair of equations could not be used to solve the following equations for x and y? 4x+2y=22 -2x+2y=-8

That’s what i got when i looked up what the solutions were

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?