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10-d=-5d
We move all terms to the left:
10-d-(-5d)=0
We add all the numbers together, and all the variables
-1d-(-5d)+10=0
We get rid of parentheses
-1d+5d+10=0
We add all the numbers together, and all the variables
4d+10=0
We move all terms containing d to the left, all other terms to the right
4d=-10
d=-10/4
d=-2+1/2
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