a/7=-3

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Solution for a/7=-3 equation: 


a in (-oo:+oo)

a/7 = -3 // + 3

a/7+3 = 0

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

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

a = -3/1/7

a = -21

a = -21

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