Respuesta :

laurenkelly849

Answer:

9x= 27 ; 3x + 4x - 7x= 0

Step-by-step explanation:

9x = 27

9•3 = 27

3x + 4x - 7x =0

3•3 + 4•3 - 7•3 = 0

9 + 12 - 21 = 0

21 - 21= 0