Collect like terms separately, the numbers and the identities (letters stuck to numbers). So, -5 remains the same, but +9c-2c becomes 7c, as 9-2=7. So, your answer is -5+7c. Also if you want more direct help, try posting your question in the maths category next time : )
The core Idea was manifest destiny. God gave us power so why not use it? Whenever we kicked mexico's behind we realized we could really accomplish this ambition
