How many solutions does 4x + 2(x – 3) = 4x + 2x – 11 have?

How do you do this geometry problem

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000