21=(c-5/2) - solution

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Solution for 21=(c-5/2) equation:

c in (-oo:+oo)

21 = c-(5/2) // - c-(5/2)

5/2-c+21 = 0

47/2-c = 0 // - 47/2

-c = -47/2 // * -1

c = 47/2

c = 47/2

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