Question

$F-32=\frac{9}{5}C$;

$x^{\circ }$ is a temperature at which centigrade and Fahrenheit read the same. Find x.

Answer 1

We have $F=\frac{9}{5}C+32$
Substituting $C=F=x$
we have, $x=\frac{9}{5}\times x+32$
$=>-\frac{4}{5}x=32$
$=>x=-{40}^o$