Respuesta :

Step 1: 13-(2c+2) = 13 -2c -2 = 11 - 2c

Step 2: 2(c+2) + 3c = 2c + 4 + 3c = 5c +4

Step 3: 11 - 2c = 5c + 4

Step 4: 11 - 4 = 5c + 2c

Step 5: 7 = 7c

Step 6: C = 1