because ( \frac122 = \frac61 = 6 ).

Consumer equilibrium refers to a situation where a consumer spends their given income on one or more goods in a way that yields maximum total satisfaction (utility). At this point, the consumer has no urge to change their expenditure pattern.

This assumes satisfaction cannot be measured in numbers, only ranked (e.g., "I like A more than B").

[ MRS_xy = \fracP_xP_y ] Where ( MRS_xy ) = Marginal Rate of Substitution (rate at which consumer is willing to exchange Y for X).