7d+3=66

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Solution for 7d+3=66 equation: 


d in (-oo:+oo)

7*d+3 = 66 // - 66

7*d-66+3 = 0

7*d-63 = 0 // + 63

7*d = 63 // : 7

d = 63/7

d = 9

d = 9

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