Question

eu quero que me ajuda 21x-3x=4-
10

Answer 1

21x - 3x = 4 - 10
18x = -6
 x = -6/18
 x = -1/3
  

Answer 2

21x-3x=4-10
21-3-4+10=-x-x
21-7+10=-x-x
21+3=-x-x
24=-x-x
24=-2x