Which of the following equations could be used to solve for x in the given diagram?

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Which of the following equations could be used to solve for x in the given diagram?<br><img src='https://www.fatskills.com/images2/GradExams/7AE3FA5A-142D-4A50-B9E7-72CF61F10E62.png' height='305' width='605'/>