Hey can I have some help please?

Is this answer correct? Or is it the third one?

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

Suppose a pendulum is l meters long. the time,t,in seconds that it tales to swing back and forth once is given by t=2.01

Find the value of x for which the lines are parallel.