Solve for d
d=-\frac{1}{7}\approx -0.142857143
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7d=-1
Subtract 1 from both sides. Anything subtracted from zero gives its negation.
d=\frac{-1}{7}
Divide both sides by 7.
d=-\frac{1}{7}
Fraction \frac{-1}{7} can be rewritten as -\frac{1}{7} by extracting the negative sign.
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