fgs7600 fgs7600

21-12-2017
Mathematics

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Mark is 15 years younger than Ashley. The sum of their ages is 55. Write a system of 2 equations to determine Mark (M) age and Ashley (A) age.

I don't know how to write this into 2 equations! Please help

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Halfblood94 Halfblood94

21-12-2017

55=2a-15 or 55=a+(a-15)

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