...°C = 80 °R =....°F PAKAI CARA Y KK......

80 °R = 5/4 × 80 °C = 100 °C

80 °R = 9/4 × 80 + 32 °F = 180 + 32 °F = 212 °F

C:R:F
5:4:9

c=5/4 × 80
=100°C

f=9/4 × 80 (+32)
=180+32
=212°F
semoga membantu :D