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9/2-2=d
We simplify the equation to the form, which is simple to understand
9/2-2=d
We move all terms containing d to the left and all other terms to the right.
-1d=-4.5+2
We simplify left and right side of the equation.
-1d=-2.5
We divide both sides of the equation by -01 to get d.
d=2.5
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