Question

How do you simplify (7x-9y) - (-7y + 9x)?

Answer 1

You want to remove the brackets. When you take out the second set of brackets, the signs inside change
(7x-9y) - (-7y + 9x)
7x - 9y + 7y - 9x
You add the matching ones together.
7x - 9x - 9y + 7y
-2x - 2y

Answer 2

ok I got that but didn't know if you had to simplify it mre. Thank you

Answer 3

You wouldn't be able to simplify anymore because there aren't any other unknowns to add to, or anything else to do.

Answer 4

can you help me on another?