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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?

Question:

A
6

explanation

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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