Solve for D_28
D_{28}=350
Assign D_28
D_{28}≔350
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D_{28}=\frac{28\times 25}{2}
Subtract 3 from 28 to get 25.
D_{28}=\frac{700}{2}
Multiply 28 and 25 to get 700.
D_{28}=350
Divide 700 by 2 to get 350.
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