Question

2x-5=x21 me ajuuuuudeeeeem

Answer 1

2x-5=21x
2x-21x=5
2x-21x=5 (.-1)
-2x+21x=-5
19x=-5
x=5/19
   

Answer 2

2x - 5 = x 21
2x - 5 - x - 21 = 0 
2x - x = 5 + 21
x = 5 +21
x = 26

Espero ter ajudado :)