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.