SOLUTION:
Algebra.Com
Question 1206444:
Answer by ikleyn(52834) (Show Source): You can put this solution on YOUR website!
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The post arrived with no question, so I deleted it.
It is my method to teach visitors to simple rule: every post must go with a question.
The method is developed, designed and intended specifically for those visitors
who deliberately disregard/neglect generally accepted rules of communication.