SOLUTION: ruth is x years old write in terms of x her age 6 years ago,what is her age in 12 yesrs time. in 12 yesrs time ruth will be 3 times as old as she waa six years ago. find ruths age

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Question 1067399: ruth is x years old write in terms of x her age 6 years ago,what is her age in 12 yesrs time. in 12 yesrs time ruth will be 3 times as old as she waa six years ago. find ruths age now
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Her age now is +x+
6 yrs ago her age was +x+-+6+
In 12 yrs her age will be +x+%2B+12+
-----------------------------------
+x+%2B+12+=+3%2A%28+x+-+6+%29+
+x+%2B+12++=+3x+-+18+
+12+=+2x+-+18+
+2x+=+12+%2B+18+
+2x+=+30+
+x+=+15+
She is 15 now
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check:
+x+%2B+12+=+3%2A%28+x+-+6+%29+
+15+%2B+12+=+3%2A%28+15+-+6+%29+
+27+=+3%2A9+
+27+=+27+
OK