alexthefrog alexthefrog

16-02-2022
Mathematics

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If twice Mary’s age is decreased by 7 is the same as her age increased by ten. How old is Mary? Be sure to use the four-step problem solving process!

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Аноним Аноним

16-02-2022

Answer: 17 years

Step-by-step explanation:

Let mary's age be m

2m-7 = m+10

Subtracting m from both sides:

m-7 = 10

Therefore, m = 17

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