You can constrain the result to whole numbers by adding "y mod 1 = 0" as an additional constraint. https://www.wolframalpha.com/input/?i=solve+for+y%2C+%5By+%3

You can constrain the result to whole numbers by adding "y mod 1 = 0" as an additional constraint. https://www.wolframalpha.com/input/?i=solve+for+y%2C+%5By+%3D+x%2B7%2Cy%3Dz%2B1%2C+y%3Ex%2Bz%2C+x%3E%3D0%2C+z%3E%3D0%2C+y%3E%3D0%2C+y+mod+1+%3D+0%5D https://www.wolframalpha.com/input/?i=solve+for+y%2C+%5By+%3...