What is the answer to5+1.5(2d-1)=0.5

You want the d?

5+1.5(2d-1)=0.5
substract 5 from both sides:

1.5(2d-1)=0.5-5

1.5(2d-1)=-4.5

divide both sides by 1.5

(2d-1)=-3

add 1 to both sides:

2d=-2

divide by 2:

d=-1

that's the solution