Tolong bantu teman ku nihh​

8. n + (-15) + (-12) = 0

n – 15 – 12 = 0

n – 27 = 0

n = 27

9. 12 + (-6 × 4) – 18 ÷ (-6) =

12 + (-24) + 3 =

12 – 24 + 3 =

-12 + 3 =

–9