1/2(p-1)=10

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Solution for 1/2(p-1)=10 equation: 


p in (-oo:+oo)

(1/2)*(p-1) = 10 // - 10

(1/2)*(p-1)-10 = 0

1/2*(p-1)-10 = 0

1/2*(p-1)-10 = 0

1/2*p-21/2 = 0

1/2*p-21/2 = 0

1/2*p-21/2 = 0 // + 21/2

1/2*p = 21/2 // : 1/2

p = 21/2/1/2

p = 21

p = 21

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