7d-2/5+3d=398/5

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Solution for 7d-2/5+3d=398/5 equation: 


d in (-oo:+oo)

7*d+3*d-(2/5) = 398/5 // - 398/5

7*d+3*d-(2/5)-(398/5) = 0

7*d+3*d-2/5-398/5 = 0

10*d-80 = 0 // + 80

10*d = 80 // : 10

d = 80/10

d = 8

d = 8

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