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OpenStudy (anonymous):
How do you simplify (7x-9y) - (-7y + 9x)?
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OpenStudy (anonymous):
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
OpenStudy (anonymous):
ok I got that but didn't know if you had to simplify it mre. Thank you
OpenStudy (anonymous):
You wouldn't be able to simplify anymore because there aren't any other unknowns to add to, or anything else to do.
OpenStudy (anonymous):
can you help me on another?
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