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99+1d/2=1881
We simplify the equation to the form, which is simple to understand
99+1d/2=1881
Simplifying:
99 + 0.5d=1881
We move all terms containing d to the left and all other terms to the right.
+ 0.5d=+1881-99
We simplify left and right side of the equation.
+ 0.5d=+1782
We divide both sides of the equation by 0.5 to get d.
d=3564
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