Simplify 5a − 8c + b + 3c −9a + 6b.

Combine like terms:

5a - 9a + b + 6b - 8c + 3c

Combine like terms:

-4a + 7b - 5c

To simplify the expression 5a - 8c + b + 3c - 9a + 6b, we can combine like terms by adding or subtracting coefficients of the same variable.

First, let's combine the like terms involving 'a': 5a - 9a = -4a.

Next, let's combine the like terms involving 'c': -8c + 3c = -5c.

Finally, let's combine the like terms involving 'b': b + 6b = 7b.

Putting it all together, we have:
-4a - 5c + 7b.

To simplify the expression 5a − 8c + b + 3c − 9a + 6b, we can combine like terms. Like terms have the same variables raised to the same exponents. In this case, the like terms are the ones with the same variables 'a' and 'b'.

First, let's combine the terms with the variable 'a'. We have 5a - 9a. To simplify this, we subtract the coefficients (the numbers in front of 'a'). 5a - 9a = -4a.

Next, let's combine the terms with the variable 'b'. We have b + 6b. Again, we add the coefficients. b + 6b = 7b.

Now, let's combine the terms with the variable 'c'. We have -8c + 3c. Subtracting the coefficients, we get -5c.

Putting it all together, the simplified expression is -4a + 7b - 5c.