1/3(21-3a)=3-a

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Solution for 1/3(21-3a)=3-a equation: 


a in (-oo:+oo)

(1/3)*(21-(3*a)) = 3-a // - 3-a

(1/3)*(21-(3*a))+a-3 = 0

(1/3)*(21-3*a)+a-3 = 0

1/3*(21-3*a)+a-3 = 0

1/3*(21-3*a)+a-3 = 0

7-3 = 0

4 = 0

4 = 0

4 = 0

a belongs to the empty set

a belongs to the empty set

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