C. Distributive Property
Explanation:
From the complete question, the correct option is C. Distributive Property. We have the following equation:
[tex]\frac{6x+9}{3}=2x+3[/tex]
But we can write this as follows:
[tex]\frac{1}{3}(6x+9)=2x+3[/tex]
So 1/3 multiplies both 6x and 9, that stands for Distributive Property, therefore:
[tex]\frac{1}{3}(6x)+\frac{1}{3}(9)=2x+3 \\ \\ 2x+3=2x+3[/tex]
Learn more:
Distributive Property: https://brainly.com/question/10794694
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