do no answer this or ill block u and not make u brainliest

Find the solution of system of equation y= x-4 y=4x+2

Can someone me with these two circle theorem questions asap?

Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.