Question

quantos graus celsius corresponde a 90* graus fahrenheit

Answer 1

$\frac{c}{5 } = \frac{f - 32}{9} \\ \\ \frac{c}{5} = \frac{90 - 32}{9} = > \frac{c}{5} = \frac{58}{9} = > agora \: \\ multiplicamos \: cruzado \:$
$9c = 58 \times 5 \\ 9c =290 \\ c = \frac{290}{9} \\ c = 32.2$