Answer:
17
Explanation:
60=4d-8
We move all terms to the left:
60-(4d-8)=0
We get rid of parentheses
-4d+8+60=0
We add all the numbers together, and all the variables
-4d+68=0
We move all terms containing d to the left, all other terms to the right
-4d=-68
d=-68/-4
d=17