Move all terms containing d to the left, all other terms to the right.
Add '-5' to each side of the equation.5 + -5 + 3d = 17 + -5
Combine like terms: 5 + -5 = 00 + 3d = 17 + -53d = 17 + -5
Combine like terms: 17 + -5 = 123d = 12
Divide each side by '3'.d = 4
Simplifyingd = 4