"4*х=6*(х-20)"

(x-20).

Here is how you can solve this equation:

1. Expand the equation: 4x = 6x - 120.
2. Simplify by subtracting 4x from both sides: -2x = -120.
3. Divide both sides by -2 to solve for x: x = 60.

Answer: x = 60.