-21/5=4d+3/5d+2/5

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Solution for -21/5=4d+3/5d+2/5 equation: 


d in (-oo:+oo)

-21/5 = 4*d+(3/5)*d+2/5 // - 4*d+(3/5)*d+2/5

-(4*d)-((3/5)*d)-21/5-(2/5) = 0

(-3/5)*d-4*d-21/5-2/5 = 0

-23/5*d-23/5 = 0 // + 23/5

-23/5*d = 23/5 // : -23/5

d = 23/5/(-23/5)

d = -1

d = -1

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