7d+6+6d=71

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Solution for 7d+6+6d=71 equation:


d in (-oo:+oo)

7*d+6*d+6 = 71 // - 71

7*d+6*d-71+6 = 0

13*d-65 = 0 // + 65

13*d = 65 // : 13

d = 65/13

d = 5

d = 5

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