First, let's simplify the equation step by step:

(120 + X) * 100 = 12000 + 100X

(12000 + 100X) / 2 = 6000 + 50X

6000 + 50X + 200 = 6000 + 50X + 200

600 + (50X / 250) * 2 = 600 + 2X

Now, let's solve for the equation:

600 + 2X = 1

Subtract 600 from both sides:

2X = -599

Divide by 2 on both sides to solve for X:

X = -299.5

Therefore, the value of X that satisfies the equation is -299.5.