John is twice as old as Mary. The sum of their ages is 52. How old is Mary?
2 answers:
Answer:
J = 2M and J + M = 52
Step-by-step explanation:
Let John's age be J
Let Mary's age be M
Now we are given that John is twice as old as Mary
So, John's age =
Now we are given that The sum of their ages is 52.
So,
Thus the system of equations could be used to solve the problem is and
Hence Option B is correct.
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