SOLUTION: If x/2 years ago, Alex is 12 years old. And x/2 years from now, he will be 2x years old. How old he will be 3x years from now?

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Question 739474: If x/2 years ago, Alex is 12 years old. And x/2 years from now, he will be 2x years old. How old he will be 3x years from now?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
If I add +x%2F2+%2B+12+, that is how old
Alex is now
If I add +x%2F2+ to that, He will be +2x+ yrs old
+x%2F2+%2B+12+%2B+x%2F2+=+2x+
+x+%2B+12+=+2x+
+x+=+12+
------------
Right now, Alex is +x%2F2+%2B+12+
+12%2F2+%2B+12+=+18+
+3x+=+3%2A12+
+3x+=+36+
+18+%2B+36+=+54+
3x years from now Alex will be 54