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A ladder is placed against a wall. Its foot is \(x\) metres from the wall, and it reaches a height of \((x+7)\) metres on the wall. If the ladder is 13 metres long, what is the distance of its foot from the wall?
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SubjectsA ladder is placed against a wall. Its foot is \(x\) metres from the wall, and it reaches a height of \((x+7)\) metres on the wall. If the ladder is 13 metres long, what is the distance of its foot from the wall?