The door on a model building is 10 inches tall. The door on the actual building is 4 yards tall. What was the scale used? (This is hopefully the question I ask today involving math)

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To find the answer you need to plug in each individual ordered pair matching up the number with the variable. the answer is (6,2) since if you plug it in the equation becomes 2 = 6 - 4, which ends up 2 = 2. since the final equation is true, then (6,2) must be the answer.