SOLUTION: Marylin's age in 7 years will be 3 times what it was 11 years ago. how old is marylin

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Question 1113027: Marylin's age in 7 years will be 3 times what it was 11 years ago. how old is marylin
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = her age now
+x+%2B+7+ = her age in 7 yrs
+x+-+11+ = her age 11 yrs ago
-------------------------------------
+x+%2B+7+=+3%2A%28+x+-+11+%29+
+x+%2B+7+=+3x+-+33+
+2x+=+40+
+x+=+20+
-----------------
She is 20 yrs old
------------------
check:
+20+%2B+7+=+3%2A%28+20+-+11+%29+
+27+=+3%2A9+
+27+=+27+
OK