7d+7=47-3d

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Solution for 7d+7=47-3d equation: 


d in (-oo:+oo)

7*d+7 = 47-(3*d) // - 47-(3*d)

7*d+3*d-47+7 = 0

10*d-40 = 0 // + 40

10*d = 40 // : 10

d = 40/10

d = 4

d = 4

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