A distributive property solve an expression in this form using variables x( y + z). The numbers inside the bracket (y + z) are not like terms using distributive law we first multiply the outside value x with the bracket value before adding them together. Like
x(y + z)
x. y + x. z
Notice we multiply x by y and x by z before adding them together.
3 - (8 - 5B)
Using distributive law we multiply negative 1 by 8 and -5B
3 - 8 + 5B
- 5 + 5B