SOLUTION: A man is 20 yrs old. his daughter is 5. in how many years will the man's age twice his daughter's age

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Question 811304: A man is 20 yrs old. his daughter is 5. in how many years will the man's age twice his daughter's age
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +20+%2B+x+ = the man's age +x+ years from now
Let +5+%2B+x+ = the daughter's age +x+ years from now
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+20+%2B+x+=+2%2A%28+5+%2B+x+%29+
+20+%2B+x+=+10+%2B+2x+
+x+=+10+
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In 10 years the man's age is twice the daughter's age
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check:
+20+%2B+x+=+2%2A%28+5+%2B+x+%29+
+20+%2B+10+=+2%2A%28+5+%2B+10+%29+
+30+=+2%2A15+
+30+=+30+
OK