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d+225=-4d-5
We move all terms to the left:
d+225-(-4d-5)=0
We get rid of parentheses
d+4d+5+225=0
We add all the numbers together, and all the variables
5d+230=0
We move all terms containing d to the left, all other terms to the right
5d=-230
d=-230/5
d=-46
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