SOLUTION: How do I write an Equation for this problem? "David's dad baked a batch of cookies. David's mom put 6 cookies in her lunch and then David took 1/3 of what was left for his lunch.

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: How do I write an Equation for this problem? "David's dad baked a batch of cookies. David's mom put 6 cookies in her lunch and then David took 1/3 of what was left for his lunch.       Log On


   

Question 1059696: How do I write an Equation for this problem?
"David's dad baked a batch of cookies. David's mom put 6 cookies in her lunch and then David took 1/3 of what was left for his lunch. His friends were impressed that he had 8 cookies in his lunch. How many cookies did David's dad make?"
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +n+ = number of cookies
David's dad made
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David took +%281%2F3%29%2A%28n+-+6%29+ cookies
+%281%2F3%29%2A%28+n+-+6+%29+=+8+
+n+-+6+=+24+
+n+=+30+
His dad made 30 cookies