Х+24=35+45

х = 56.

The calculations are as follows:

1. Subtract 35 from both sides: х + 24 - 35 = 35 + 45 - 35.
2. Simplify: х - 11 = 45.
3. Add 11 to both sides: х - 11 + 11 = 45 + 11.
4. Simplify: х = 56.