Mathematics, 12.11.2020 01:00 sophialoperx

Higgins Middle School hosted a mathematics competition. The algebraic proof below was given. Fill in the missing reason.
-4(2x + y) + 3y + 2x)
Given
= -4(2x + y) + 3(2x + y)
?
= -4.2x - 4.y+3.2x +3.y Distributive Property
= -8x - 4y + 6x + 3y
Write an Equivalent Equation
= -8x + 6x - 4y + 3y
Commutative Property of Addition
= -2x - y
Write an Equivalent Equation
A
Commutative Property of Multiplication
B
Commutative Property of Addition
C с
Associative Property of Multiplication
D
Associative Property of Addition

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Higgins Middle School hosted a mathematics competition. The algebraic proof below was given. Fill i...