Solve for x d (-3+x) = kx+9

1. Write the equation:

d (-3 + x) = kx + 9

2. "Open" the parenthesizes:

-3d + dx = kx + 9

3. Take kx to the left side, - 3d to the right, everything with different sign ( + replace with - when transferring, - replace with + ):

dx - kx = 9 + 3d

4. Factor x in the left side:

x (d - k) = 9 + 3d

5. Finally, divide the whole equation by (d - k):

x = (9 + 3d) / (d - k)

That's the final answer. Good luck!