In a kitchen there are four containers that can hold different quantities of water, as shown in the figure below. Four containers of the same shape but different sizes are shown, arranged from the shortest to the longest. The following quantities are written below the containers. (x − 2) liters below the first, x liters below the second, (x + 2) liters below the third, and (x + 4) liters below the fourth. How many liters of water can the four containers hold in all? x4 + 4 2x + 4 x2+ 2x 4x + 4
(x - 2) + (x) + (x + 2) + (x + 4) = 4 x + 4
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