Write a justification for each step. Choose from the following reasons.
Addition Property of Equality
Division Property of Equality
Segment Addition Postulate Simplify
Substitution Property of Equality. HJ=HI+IJ
7x - 3 - (2x+6) + (3x - 3)
7x - 3 = 5x + 3
7x = 5x + 6
2x = 6
x=3