Please solve the programming task below using a self-contained code snippet in a markdown code block.

Solve a given equation and return the value of 'x' in the form of a string "x=#value". The equation contains only '+', '-' operation, the variable 'x' and its coefficient. You should return "No solution" if there is no solution for the equation, or "Infinite solutions" if there are infinite solutions for the equation.
If there is exactly one solution for the equation, we ensure that the value of 'x' is an integer.
 
Please complete the following python code precisely:
```python
class Solution:
    def solveEquation(self, equation: str) -> str:
```