4.1 * 1 - 5x = 9 - 3 * (6y - 5)

1. Simplify the left side: 4.1 - 5x = 9 - 3 * (6y - 5)

2. Distribute on the right side: 4.1 - 5x = 9 - 18y + 15

3. Combine constants on the right side: 4.1 - 5x = 24 - 18y

4. Rearrange to isolate x: -5x = 24 - 4.1 - 18y

5. Simplify and solve for x: -5x = 19.9 - 18y => x = (18y - 19.9) / 5