72 °R=…°F=…°C (dengan jalannya)

^ = derajat
72^R = …^F
= 80-72/4 = 212 – y/9
= 8/4×9 = 18
= 212-18
= 194^F

194^F =…^C
=212-194/9=100-y/5
=18/9 x 5 =10
=100 -10
=90 ^ C
jadi 72^ R =194^F=90^C
* semoga membantu