# Algebra

**URL:** <https://forum.kirupa.com/t/algebra/180735>\
**Category:** open source\
**Created:** [March 3, 2006, 3:25am UTC](https://forum.kirupa.com/t/algebra/180735 "2006-03-03T03:25:06Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Jeff\_Wheeler](https://avatars.discourse-cdn.com/v4/letter/j/59ef9b/32.png) [@Jeff\_Wheeler](https://forum.kirupa.com/u/Jeff_Wheeler)\
**Post date:** [March 3, 2006, 3:25am UTC](https://forum.kirupa.com/t/algebra/180735/1 "2006-03-03T03:25:06Z")

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Heh. I’m sure this has got to be difficult, but I’ve always been a bit curious how this works.

Any way to do goal-seeking PHP which can do math until it has reached a variable on one side of an equation?

I’ll be surprised, but very delighted, if somebody replies. 🙂