Sabrina is building a rectangular raised flower bed. The boards on the two shorter sides are 6 inches thick, and the boards on the two longer sides are 4 inches thick. Sabrina wants the outer length of the bed four times it's height and the outer width to be 2 times it's height. She also wants the boards to rise 4 inches above the soil in the bed. What should the outer dimensions of the beds be if she wants it to hold 3136 cubic inches of soil? (How on earth do I start this?)
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