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-7(d+23)=-70
We move all terms to the left:
-7(d+23)-(-70)=0
We add all the numbers together, and all the variables
-7(d+23)+70=0
We multiply parentheses
-7d-161+70=0
We add all the numbers together, and all the variables
-7d-91=0
We move all terms containing d to the left, all other terms to the right
-7d=91
d=91/-7
d=-13
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