The Thomas family had an internet system for their family room installed. The installation fee was $90 and the monthly internet charge is 30$. If the Thomas family has paid $450 so far, for how many months have they had the internet? Show all work.

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The Thomas family had an internet system for their family room installed. The installation fee was $90 and the monthly internet charge is 30$. If the Thomas family has paid $450 so far, for how many months have they had the internet? Show all work.

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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\[90+30x=450\] \[30x=450-90=360\] \[x=\frac{360}{90}=4\]
typo!
\[x=\frac{360}{30}=12\]

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