You can put this solution on YOUR website! an-20=5n what does n=?
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Post these like this:
an-20=5n
Solve for n.
Not "what does n equal?"
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an-20=5n
Solve for n
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an-20=5n
Get all the n terms on the same side
an-20=5n
an - 5n - 20 = 0
Add 20
an - 5n = 20
n*(a-5) = 20