5a − 8c + b + 3c −9a + 6b .

Answer 1

To simplify the expression 5a − 8c + b + 3c − 9a + 6b, we can combine like terms:

(5a - 9a) + (-8c + 3c) + (b + 6b)
-4a - 5c + 7b

Therefore, the simplified expression is -4a - 5c + 7b.