A recipe says to use 2/3 cup milk to make 4/5 serving of pudding. How many cups of milk are in one serving?

cups

Step-by-step explanation:

The serving size is proportional to the amount of milk used, so we have

where is the amount of milk needed for 1 serving. The right side is simply . We now simplify

Therefore cups of milk are needed for 1 serving.

2(2x + 3) = -4 + 2(2x + 5)

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 6

4x - 6 + 6 = 4x - 6 + 6

4x = 4x

x = x

unlimited solutions.