21=(c+5)/2

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


c in (-oo:+oo)

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

21-((c+5)/2) = 0

(-1*(c+5))/2+21 = 0

(-1*(c+5))/2+(2*21)/2 = 0

2*21-1*(c+5) = 0

37-c = 0

(37-c)/2 = 0

(37-c)/2 = 0 // * 2

37-c = 0

37-c = 0 // - 37

-c = -37 // * -1

c = 37

c = 37

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