Name the property shown by each statement.

31 + (4 + 17) = (31 + 4) + 17
a.
commutative property of addition
c.
substitution property of equality
b.
associative property of addition
d.
additive identity

I believe the equation shown above is an example of:

B. Associative Property of Addition.

Hope I helped!!

There is no question, there is just the answer.

2(10 - 13x) + 9x = -34x + 6020 - 26x + 9x = -34x + distributive property-17x = -34x + subtraction property (subtracted 20 from both sides)17x = addition property (added 34x to both sides)x = 40/ division property (divided both sides by 17)