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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…

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…
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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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User CustomCalc
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8.6k points

2 Answers

5 votes
C. 2x=21 because he Is 21 and that can solve
answered
User Vassily
by
7.9k points
7 votes
2x+x=21(tommy+his sister is 21)It could be B
answered
User Eyesnz
by
8.3k points
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