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Ali is x years old and her sister Sara is (10x - 24) years old. Given that Sara is twice as old as Ali, what is Sara’s age?

A 6

State the problem in a mathematical equation:
2x = 10x − 24
2x − 10x= −24
−8x = −24
Ali’s age: x = 3
Sarah’s age: 10x – 24 = 10 × 3 - 24 = 6

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