(d/4)+(-3/d)=(5d+7)/(20)

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Solution for (d/4)+(-3/d)=(5d+7)/(20) equation: 


D( d )

d = 0

d = 0

d = 0

d in (-oo:0) U (0:+oo)

d/4-3/d = (5*d+7)/20 // - (5*d+7)/20

d/4-((5*d+7)/20)-3/d = 0

(-1*(5*d+7))/20+d/4-3/d = 0

(-1*4*d*(5*d+7))/(4*20*d)+(20*d^2)/(4*20*d)+(-3*4*20)/(4*20*d) = 0

20*d^2-1*4*d*(5*d+7)-3*4*20 = 0

-28*d-240 = 0

(-28*d-240)/(4*20*d) = 0

(-28*d-240)/(4*20*d) = 0 // * 4*20*d

-28*d-240 = 0

-28*d-240 = 0 // + 240

-28*d = 240 // : -28

d = 240/(-28)

d = -60/7

d = -60/7

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