Question 597350
2x+5x+4=25 
16=4w+2w-2 
31+4t-t=40 
7a+16-3a=-4 
7m+3-4m=-9
------------
Is that all one problem?
If so, --> no solution.
--------
If they're separate problems, show your efforts.
email via the Thank You  not for help, or to check your work.