Answer:
a). -16
Step-by-step explanation:
In this question, you have to solve the equation for the variable "d".
Solve:
9d + 1 = 8d - 15
Subtract 8d from both sides to move all the "d" variables to one side.
d + 1 = -15
Subtract 1 from both sides to get "d" by itself.
d = -16
Your final answer would be d = -16
