Answer:
simplifed. 5d-12=10d+53 (answer)
D= 4 and 1/5 ( just for extra information)
Step-by-step explanation:
arrange familiar terms together
6d-d-12=9d+D+53
now simplify both sides of the equation
5d-12=10d+53
subtract 10d from both sides of the equation to get
-5d-12=53
add 12 to both sides of the equation to get
-5d=41
divide both sides of the equation by -5d to get
D= 4 and 1/5
hope this helps :)
