Math !

which properties justify the steps taken to solve the system?
[use pics below]

6x - 8 = 16 solve the following equation. then place the correct number in the box provided.

Which of the following statements is not true? a.parallel lines are lines in the same plane that never intersect. b.congruent figures have the same shape and same size angles and sides. c.similar figures must have the same shape and the same size. d.a rotation is when you turn a figure around a certain point.

Find the domain of the following expression: 1/(√x)-2