Question

a quantos graus celsius correspondem 140f ?

Answer 1

Basta utilizar a fórmula:

$5. T_{F}-160 = 9. T_{C}$

Substituindo temos:
$5.140 - 160 = 9.T_{C} \\ 540 = 9. T_{C} \\ T_{C} = \frac{540}{9} \\ T_{C} = 60$

Answer 2

OC/5 = 140-32/9
9OC=700-160
9OC=540
OC=540/9
0C=60°C