7+7d-4d=13

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Solution for 7+7d-4d=13 equation: 


d in (-oo:+oo)

7*d-(4*d)+7 = 13 // - 13

7*d-(4*d)-13+7 = 0

7*d-4*d-13+7 = 0

3*d-6 = 0 // + 6

3*d = 6 // : 3

d = 6/3

d = 2

d = 2

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