Whzgud200 Whzgud200

30-11-2017
Mathematics

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Tommy is twice as old as his younger sister.The sum of the siblings' ages is 21. Which equation can be used to determine the age of Tommy's younger sister? A. x-2=21 B. x+2x=21 C. 2x=21 or D. x/2=21

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XxzBRYANzxX XxzBRYANzxX

30-11-2017

2x+x=21(tommy+his sister is 21)It could be B

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DaniaShaddock DaniaShaddock

30-11-2017

C. 2x=21 because he Is 21 and that can solve

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