Respuesta :

3(9+a)=54

3×9 + 3×a =54

27 + 3a = 54

3a - 27 = 54 -27 = 27

3a÷ 3 = 27÷ 3= 9

a = 9

Happy to help

Answer:

9

Step-by-step explanation:

i did 54 divided by 3 and got 18 so i know 9+9=18

18 times 3 =54