Respuesta :

ROYADE

Answer:

x-6

Step-by-step explanation:

The mistake when expanding the bracket 3(x-6),3 was supposed to multiply 6 but instead it was added to 6 instead

the correct working

3(x-6)+(4x+12)-6x

3x-18+4x+12-6x

(3x+4x-6x)+(-18+12)

=x-6