TolongDiJawabYaaPakeCara..

-7+18-15 = 11-15 = - 4
Jadi jawabannya C

suhu 7°C dibawah nol = -7°C
suhu naik 18°C = +18°C
suhu turun 15°C = -15°C

Suhu sekarang = -7°C + 18°C - 15°C
                         = -4°C

Jawaban C