5d+9=45-7d

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Solution for 5d+9=45-7d equation: 


d in (-oo:+oo)

5*d+9 = 45-(7*d) // - 45-(7*d)

5*d+7*d-45+9 = 0

12*d-36 = 0 // + 36

12*d = 36 // : 12

d = 36/12

d = 3

d = 3

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