7-2d=25

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Solution for 7-2d=25 equation: 


d in (-oo:+oo)

7-(2*d) = 25 // - 25

7-(2*d)-25 = 0

7-2*d-25 = 0

-2*d-18 = 0 // + 18

-2*d = 18 // : -2

d = 18/(-2)

d = -9

d = -9

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