For this case we have that if the chef did[tex]\frac {3} {4}[/tex]of a recipe and use 20 cups of milk then the given equation, to show the number of cups of milk with the full recipe, is wrong. To demonstrate we make a rule of three:
20 --------------> [tex]\frac {3} {4}[/tex]
x ----------------> 1
Where "x" represents the number of cups of milk for the full recipe.
[tex]x = \frac {1 * 20} {\frac {3} {4}}\\x = \frac {4 * 20} {3}[/tex]
So:
[tex]3x = 4 * 20\\\frac {3} {4} x = 20[/tex]
Answer:
[tex]\frac {3} {4} x = 20[/tex]
