How do I answer this???

Is the open sentence 5x-2=3x+2 true when x=2? justify your answer.

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)

Arational number that is equivalent to -20/4?