What operation always joins a number and it's coefficient in an algebraic expression?

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

Hell . what are the solutions to `10x^2 - 38x - 8 = 0`? is this when i find the factors and use the numbers within the factors to determine the zeros? i hope that made sense lol

Segment wx is shown explain how you would construct a perpendicular bisector of wx using a compass and a straightedge