Jawabanmu

2014-03-15T06:58:29+07:00
°C ke °F = (9/5.x°C)+32° F °C ke °F akan menunjukkan skala yg sama pada angka -40°: 4/5 dari x°C = -32° = 5/4.-32° = -40° jadi, -40°C = -40°F = (9/5.-40°C)+32° = -72°+32° = -40°F
2014-03-15T08:46:15+07:00
F = 9/5 C + 32 ..... (1)

F = C .....(2)

masukkan (2) ke (1)

C = 9/5 * C + 32
(1 - 9/5)*C = 32
-4/5 C = 32
C = -40

jawabannya C = F = -40
1 5 1