Indicate which property is illustrated in Step 7.

Step 1 10 + 9x - 10 - 3x + 2 = 10 + (9x - 10) - 3x + 2
Step 2 = 10 + (-10 + 9x) - 3x + 2
Step 3 = [10 + (-10)] + (9x - 3x) + 2
Step 4 = 0 + (9x - 3x) + 2
Step 5 = (9x - 3x) + 2
Step 6 = (9 - 3)x + 2
Step 7 = 6x + 2
@abb0t @Joel_the_boss @robtobey

Question

Indicate which property is illustrated in Step 7.

Step 1	10 + 9x - 10 - 3x + 2	=	10 + (9x - 10) - 3x + 2
Step 2		=	10 + (-10 + 9x) - 3x + 2
Step 3		=	[10 + (-10)] + (9x - 3x) + 2
Step 4		=	0 + (9x - 3x) + 2
Step 5		=	(9x - 3x) + 2
Step 6		=	(9 - 3)x + 2
Step 7		=	6x + 2
@abb0t @Joel_the_boss @robtobey

tkhunny · Answer

Well, you had better start indicating.  What's first?