In which cases do you change a + or - to the opposite one if they're inside brackets?

You know how x-(y-z) = x-y+z... In which cases do you change the symbol inside the brackets?In which cases do you change a + or - to the opposite one if they're inside brackets?
If you have a - before the brackets, and you remove the brackets, the signs of the constants or variables in the brackets change to their opposite. For example -(y-z) becomes -y + z, because y has a plus sign (it becomes minus) and z has a minus sign (it becomes a plus).


The trick in understanding what's happening is understanding subtraction does not really really exist. It's just an addition with negative numbers in the middle.In which cases do you change a + or - to the opposite one if they're inside brackets?
multiplied the symbol.


if the congruent symbol being multiplied will form positive symbol while in-congruent symbol being multiplied from negative symbol.


+ x + = +


+ x - = -


- x + = -


- x - = +


so u calculate the negative symbol to the symbol inside the bracket.
You change symbols inside the bracket , when they are being multiplied by a negative sign or a negatiove number from the outside.