How do we work do equations plz me, you

If you mean equations with variables then for example:
2x+5=15
First you subtract 5 from both sides, so:
2x+5=15
-5. -5
2x=10
Divide both sides by 2.
x=5
Hope this is what your looking for!

Try these steps (Im a middle school student not college student actually) 

Clear out any fractions by Multiplying every term by the bottom parts.Add or Subtract the same value from both sides.Divide every term by the same nonzero value.Combine Like Terms.Factoring.Expanding (the opposite of factoring) may also help.