30=v-21/2-0 - solution

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Solution for 30=v-21/2-0 equation:

v in (-oo:+oo)

30 = v-(21/2)+0 // - v-(21/2)+0

21/2-v+0+30 = 0

21/2-v+30 = 0

81/2-v = 0 // - 81/2

-v = -81/2 // * -1

v = 81/2

v = 81/2

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