7=-1/3a

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Solution for 7=-1/3a equation: 


a in (-oo:+oo)

7 = (-1/3)*a // - (-1/3)*a

7-((-1/3)*a) = 0

(1/3)*a+7 = 0

1/3*a+7 = 0 // - 7

1/3*a = -7 // : 1/3

a = -7/1/3

a = -21

a = -21

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