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d/30=-26
We move all terms to the left:
d/30-(-26)=0
We add all the numbers together, and all the variables
d/30+26=0
We multiply all the terms by the denominator
d+26*30=0
We add all the numbers together, and all the variables
d+780=0
We move all terms containing d to the left, all other terms to the right
d=-780
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