21p-4=(12p+7)/2

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Solution for 21p-4=(12p+7)/2 equation: 


p in (-oo:+oo)

21*p-4 = (12*p+7)/2 // - (12*p+7)/2

21*p-((12*p+7)/2)-4 = 0

(-1*(12*p+7))/2+21*p-4 = 0

(-1*(12*p+7))/2+(2*21*p)/2+(-4*2)/2 = 0

2*21*p-1*(12*p+7)-4*2 = 0

30*p-8-7 = 0

30*p-15 = 0

(30*p-15)/2 = 0

(30*p-15)/2 = 0 // * 2

30*p-15 = 0

30*p-15 = 0 // + 15

30*p = 15 // : 30

p = 15/30

p = 1/2

p = 1/2

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