# The sum of half a number nn and 7 is at most 20.

The sum of half a number nn and 7 is at most 20.
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dessinemoie
If you are trying to find the value of n you need to first make an equation. When it says "half a number n" that means that you have one half times n. Then you add 7 because it says "and 7." Finally when it says is at most that means the total. So for this equation, it would be 20. So the equation would be $\frac{1}{2n}+7=20.$ Then you subtract 7 from both sides.
$\frac{1}{2n}=13$
Then you have to multiply by the reciprocal which is 2.
$2\frac{1}{2n}=2\left(13\right)$
Then your $\frac{1}{2}$ and 2 will cancel so you are left with:
n=26