Solving for x:

(-0.01x - 4.9) * 758.1 = 0

-0.01x 758.1 - 4.9 758.1 = 0

-7.581x - 3733.89 = 0

-7.581x = 3733.89

x = 3733.89 / -7.581

x ≈ -492.51

Therefore, x is approximately equal to -492.51.