1/2d+9/10=13/20

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Solution for 1/2d+9/10=13/20 equation: 


d in (-oo:+oo)

(1/2)*d+9/10 = 13/20 // - 13/20

(1/2)*d+9/10-(13/20) = 0

(1/2)*d+9/10-13/20 = 0

1/2*d+1/4 = 0 // - 1/4

1/2*d = -1/4 // : 1/2

d = -1/4/1/2

d = -1/2

d = -1/2

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