Answer:
To solve for k, we first need to isolate k on one side of the equation by subtracting 61.1 from both sides:
K/7.8 + 61.1 - 61.1 = 17.8 - 61.1
K/7.8 = -43.3
Next, we multiply both sides by 7.8 to isolate k.
K = -43.3 * 7.8
K = -338.34
Therefore, k is approximately equal to -338.34.