s/2+7=9

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Solution for s/2+7=9 equation: 


s in (-oo:+oo)

s/2+7 = 9 // - 9

s/2-9+7 = 0

1/2*s-2 = 0 // + 2

1/2*s = 2 // : 1/2

s = 2/1/2

s = 4

s = 4

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