SOLUTION: I need help with these problems X(Yz)=x(zy) 2(x+y)=2x+2y (X+y)+z=(y+x)+z (X+y)+z=x+(y+z) 2[x(a+d)]=[2x](a+d) I need to know which ones are commutative, associative, ident

Question 985776: I need help with these problems
X(Yz)=x(zy)
2(x+y)=2x+2y
(X+y)+z=(y+x)+z
(X+y)+z=x+(y+z)
2[x(a+d)]=[2x](a+d)
I need to know which ones are commutative, associative, identity, or inverse
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
X(Yz)=x(zy):: y and z changed places::: commutative
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2(x+y)=2x+2y::: mult. by 2 distributed over addition:: distributive
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(X+y)+z=(y+x)+z:: x and y changed places:: commutative
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(X+y)+z=x+(y+z):: grouping changes:: associative
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2[x(a+d)]=[2x](a+d):: grouping changed:: associative
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Cheers,
Stan H.
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