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A teacher asked the class to solve the equation 3(x + 2) = 21.
Robert wrote 3x + 6 = 21 as his first step. Which property did he use?
(1) associative property (3) distributive property
(2) commutative property (4) zero property of addition



Answer :

Cham1
It is the distubitive property because he got rid of the ( )
LexiBoone
3)distributive property
Robert had given 3 to each term. which then results in 3x+6=21. Then. if he further went on, you would subtract 6 from each side giving you 15 then divide 15 by 3 giving you x=5. 

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