PLIX

Move the numbers from both sides of these equations to set up a matrix equation to represent this situation by dragging the red points.

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You hear from your friends that there is a sale going on at a local school supplies store. You want to buy one pen, one folder, and one notebook from the store, but you don't know how much everything will cost. Your friends don't remember the cost of each individual item they bought, but they do remember what they bought and how much it cost in total. Here is what they tell you:

Ben bought 20 pens, 3 folders, and 2 notebooks for $15.

Alexis bought 10 pens, 4 folders, and 1 notebook for $10.

Nick bought 8 pens, 6 folders, and 2 notebooks for $15.

Move the numbers from both sides of these equations to set up a matrix equation to represent this situation by dragging the red points.