Final answer:
To rearrange the equation for a, subtract b/8c from both sides: a = 4x - b/8c.
Step-by-step explanation:
To rearrange the equation for a, we start with the given equation 4x = a + b/8c. First, we isolate a by subtracting b/8c from both sides, giving 4x - b/8c = a. Therefore, the equation for a in terms of b, c, and x is a = 4x - b/8c.