3a-6=15

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Solution for 3a-6=15 equation: 


a in (-oo:+oo)

3*a-6 = 15 // - 15

3*a-15-6 = 0

3*a-21 = 0 // + 21

3*a = 21 // : 3

a = 21/3

a = 7

a = 7

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