Crypto - sugar free candies equation help

This equation is not working, any help on fixing it?

```
def solve_system(x, y, z, v1, v2, v3, v4):
		return solve([
                	x**3 + z**2 + y == v1,
                  y**3 + x**2 + z == v2,
                  z**3 + y**2 + x == v3,
                  x + y + z == v4
                ], x, y, z, solution_dict=True)[0]
```