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Amy and Sarah are twins. They have a younger brother who is 3 years younger. Frankie was asked to write an expression for the total of their ages. He said ‘ x + x + x + 3 = 3x + 3 Do you agree with his
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3 votes
3 votes
Amy and Sarah are twins. They have a younger brother who is 3 years younger.

Frankie was asked to write an expression for the total of their ages.
He said ‘ x + x + x + 3 = 3x + 3

Do you agree with his answer? Give a reason why.

User Andrei Bozantan
by
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1 Answer

12 votes
12 votes

Answer: no, because you are subtracting the 3 rather than adding

Explanation:

twins= x + x

brother= x-3

equation =2x + (x-3)

User Takao
by
3.7k points
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