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Answer:
x = 3
Explanation:
5x = 9 + 2x
⇔ 5x - 2x = 9
⇔ 3x = 9
⇔ 3x/3 = 9/3
⇔ x = 3
5x - 2x = 9
3x = 9
x = 9/3 = 3
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