Answer:
x = [tex]\frac{9+3d}{d-k}[/tex]
Step-by-step explanation:
Given
d(- 3 + x) = kx + 9 ← distribute parenthesis on left side
- 3d + dx = kx + 9 ( add 3d to both sides )
dx = kx + 9 + 3d ( subtract kx from both sides )
dx - kx = 9 + 3d ← factor out x from each term on the left side
x(d - k) = 9 + 3d ← divide both sides by (d - k)
x = [tex]\frac{9+3d}{d-k}[/tex]
