```
x sum y = z
```

how can i find the ‘y’?

example:

```
5 sum y = 8
result "3"
5 sum y = 3
result "-2"
```

any idea?

Source: Stackoverflow

```
x sum y = z
```

how can i find the ‘y’?

example:

```
5 sum y = 8
result "3"
5 sum y = 3
result "-2"
```

any idea?

Source: Stackoverflow

y = ( z- x )