SOLUTION: Mary's sister is 7 years older than Mary. Their combined ages add up to 35. How old is Mary? I need to show the equation. I keep coming up with m+7=35 but I know this isn't right.
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Question 509631: Mary's sister is 7 years older than Mary. Their combined ages add up to 35. How old is Mary? I need to show the equation. I keep coming up with m+7=35 but I know this isn't right. Can you help me?
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
Mary is m, her sister is m+7 ___ together they are 35
m + m + 7 = 35 ___ 2m = 28
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