7d+6=20

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Solution for 7d+6=20 equation: 


d in (-oo:+oo)

7*d+6 = 20 // - 20

7*d-20+6 = 0

7*d-14 = 0 // + 14

7*d = 14 // : 7

d = 14/7

d = 2

d = 2

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