Answer: [tex]x=\bold{\dfrac{a(c-2)}{9+b}}[/tex]
Step-by-step explanation:
9x + 2a = ac - bx
9x = ac - bx - 2a subtracted 2a from both sides
9x + bx = ac - 2a added bx to both sides
x(9 + b) = a(c - 2) factored out x from the left and a from the right
[tex]x=\large\boxed{\dfrac{a(c-2)}{9+b}}\\[/tex] divided both sides by 9+b