3w-9=21

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Solution for 3w-9=21 equation: 


w in (-oo:+oo)

3*w-9 = 21 // - 21

3*w-21-9 = 0

3*w-30 = 0 // + 30

3*w = 30 // : 3

w = 30/3

w = 10

w = 10

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