Question

me ayudan porfavor

9x-6=21 3x+6=21 12.4=15-x 24=2x+x
x= x= x= x=


??

Answer 1

9x -6 = 21 
9x = 21+6
9x = 27 
x = 27/9
x = 3 


3x+6=21 
3x = 21-6 
3x = 15 
x = 15/3
x = 3


12·4 = 15 - x 
48 = 15 - x
x = 15-48 
x= -33

24=2x+x 
-3x = -24  (-1) 
3x = 24 
x= 24/3 
x= 8


espero te sirva :)