d-1/2+2d=-13/5

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Solution for d-1/2+2d=-13/5 equation: 


d in (-oo:+oo)

d+2*d-(1/2) = -13/5 // + -13/5

d+2*d-(1/2)-(-13/5) = 0

d+2*d-1/2+13/5 = 0

3*d+21/10 = 0 // - 21/10

3*d = -21/10 // : 3

d = -21/10/3

d = -7/10

d = -7/10

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