You can put this solution on YOUR website! 25u+74=23u+92
First you would subtract 23u from 25u leaving you with 2u+74=92. Then you would subtract 74 from 92 leaving you with 2u=18. Finally you would divide 18 by 2 leaving you with u=9.
25u+74=23u+92
-23u 23u
_______________
2u+74=92
- 74 74
_______________
2u=18
2 2
_________
u=9