Algebra 1

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What property justifies that 3y+9 = 9+3y

• Algebra 1 -

3y + 9 = 9 + 3y
Commutative Property

a + b = b + a
in numbers, this means 2 + 3 = 3 + 2

• Algebra 1 -

What property justifies:

6a+(2a+8b)

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