SOLUTION:
Algebra.Com
Question 1156503:
Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
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Hello,
each solution to every problem is a small lecture/lesson.
THEREFORE,
if you want to learn from this forum, NEVER place more than one problem into your post.
It is the RULE, the POLICY and the REQUIREMENT of this forum.
One problem per green (!)