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4(d+7)=-1
We move all terms to the left:
4(d+7)-(-1)=0
We add all the numbers together, and all the variables
4(d+7)+1=0
We multiply parentheses
4d+28+1=0
We add all the numbers together, and all the variables
4d+29=0
We move all terms containing d to the left, all other terms to the right
4d=-29
d=-29/4
d=-7+1/4
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