3w-9=12

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Solution for 3w-9=12 equation: 


w in (-oo:+oo)

3*w-9 = 12 // - 12

3*w-12-9 = 0

3*w-21 = 0 // + 21

3*w = 21 // : 3

w = 21/3

w = 7

w = 7

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