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When solving the equation 4(3x^2 +2)-9=8x^2+7. Emily wrote 4(3x + 2)=8x^2 + 16 as her first step. Which property justifies Emily's first step? State a reason why1) Addition Property of Equality2)Commutative Property of Addition3) Multiplication Property of Equality4) Distributive Property of Multiplication Over Addition

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ghanami
hello : 
4(3x² +2)-9=8x²+7 = 4(3x^2 +2)-9 +9 =8x²+7 +9 
                                =  4(3x² + 2)=8x² + 16
(State a reason why1) Addition Property of Equality)

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