(8k-7b) - (8k+6b) 3 3

Assuming the expression is ( (8k − 7b) / 3 ) − ( (8k + 6b) / 3 ):

• Combine over the common denominator: [(8k − 7b) − (8k + 6b)] / 3 = (8k − 7b − 8k − 6b) / 3 = (−13b) / 3

Answer: -13b/3

If you meant something else (e.g., (8k−7b)/3 − (8k+6b)/3 with a different arrangement), please share and I’ll adjust.