-9=-1/7a

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Solution for -9=-1/7a equation: 


a in (-oo:+oo)

-9 = (-1/7)*a // - (-1/7)*a

-((-1/7)*a)-9 = 0

(1/7)*a-9 = 0

1/7*a-9 = 0 // + 9

1/7*a = 9 // : 1/7

a = 9/1/7

a = 63

a = 63

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