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0.3+d=8
We simplify the equation to the form, which is simple to understand
0.3+d=8
We move all terms containing d to the left and all other terms to the right.
+1d=+8-0.3
We simplify left and right side of the equation.
+1d=+7.7
We divide both sides of the equation by 1 to get d.
d=7.7
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