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If five times a number is added to three times the number, the result is the sum of seven times the number and $9$. Find the number.

I am pretty sure it is $5x+3x=7x+9$ although I am not positive.

Help?

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up vote 3 down vote accepted

You're correct. Solve for $x$ and get $8x-7x=x=9$.

Hope that helps!

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