Question

   por favor me ajud    13X-11=15x+21

Answer 1

13x-15x= 21+11
-2x=32
2x=-32
x=-32/2
x=-16

Answer 2

13x - 11 = 15x + 21 
13x - 15x = 21 + 11
-2x = 32 . (-1)
2x = - 32
x = -32/ 2
x = -16