Respuesta :

Answer:

X = 3

Step-by-step explanation:

42 = 6x + 7x + 3

42 = 13x + 3   (simplify)

-3              -3  (subtract 3)

39 = 13x

/13     /13  (divide by 13)

3 = x


Hope this helps!! Can I please have brainliest!!