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