Respuesta :

Answer:

c = -1

Step-by-step explanation:

3(c+5)=12

3 × c = 3c

3 × 5 = 15

3c + 15 = 12

     - 15   -15

   3c = -3

c = -3 ÷ 3 = -1

Check:

3(-1+5)=12

-3 + 15 = 12

3c+15=12
Then u subtract 15 from both sides
3c=3
Then u divide by 3
C=1