72 reamur=.... Fahrenheit=.... Celcius

72 reamur=…. Fahrenheit=…. Celcius

72 reamur = …. fahrenheit
⇒ 72 * 2.25 + 32 = 162 + 32 = 194 °F

194 fahrenheit = …. celcius
⇒ $frac{194-32}{1,8} = frac{162}{1,8}$ = 90° celcius

C : R : (F – 32) = 5 : 4 : 9

C : R = 5 : 4
C : 72 = 5 : 4
$frac{C}{72} = frac{5}{4} \ ( frac{C}{72})72 = (frac{5}{4}) 72 \ C = 90$

R : (F – 32) = 4 : 9
72 : (F – 32) = 4 : 9
$frac{F - 32}{72} = frac{9}{4} \ (frac{F - 32}{72})72 = (frac{9}{4}) 72 \ F - 32 = 162 \ (F - 32) + 32 = 162 + 32 \ F = 194$ = 4 : 9