-4x+5B-7x=o

I think you meant the equation -4x + 5B - 7x = 0, solving for x in terms of B.

Steps:

• Combine the x-terms: (-4x - 7x) + 5B = 0 ⇒ -11x + 5B = 0
• Solve for x: -11x = -5B ⇒ x = (5/11) B

So x = 5B/11. If B is a known number, just substitute it in.

If you meant a different equation (e.g., -4x + 5x - 7x = 0 or something with a zero on the right), tell me and I’ll adjust.