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Martin is two years younger than three times his daughter Ada’s age. The sum of their ages is 54. If Ada’s age is given by a, then which equation below fully models in the information given in this problem?
A. 3a-2=54
B. a+(3a-2)=54
C. a+(2-3a)=54
D. a-(3a-2)=54
It would be B. We need to multiply Ada’s age by 3 and subtract 2 which is 3a - 2. We also need to add Ada’s age (a) and make it equal to 54 so a + (3a - 2) = 54
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