9-3a=15

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Solution for 9-3a=15 equation: 


a in (-oo:+oo)

9-(3*a) = 15 // - 15

9-(3*a)-15 = 0

9-3*a-15 = 0

-3*a-6 = 0 // + 6

-3*a = 6 // : -3

a = 6/(-3)

a = -2

a = -2

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