I'm not really sure how to fro it, can anyone me?

Need this asap if anyone can i would be very grateful. if you could show workings that would really

If 3x+8=3x+8 is it one solution or no solution

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)