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d/1400+d/800=4
We simplify the equation to the form, which is simple to understand
d/1400+d/800=4
Simplifying:
+ 0.000714285714286d+d/800=4
Simplifying:
+ 0.000714285714286d + 0.00125d=4
We move all terms containing d to the left and all other terms to the right.
+ 0.000714285714286d + 0.00125d=+4
We simplify left and right side of the equation.
+ 0.00196428571429d=+4
We divide both sides of the equation by 0.00196428571429 to get d.
d=2036.36363636
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