3. Solving Word Problems

Find the unknown numbers.

One number is nine less than another. Their sum is negative twenty-seven.

Find the unknown number.

If half of a number is added to $\frac{2}{5}$, the result is the same as subtracting $\frac{1}{10}$ from the number.

Patricia has $30$ meters of fencing to make a rectangular garden in her backyard. She wants the length to be $5$ meters more than the width. Complete steps $1$ & $2$ of the word problem solving process to set up an equation Patricia could use to find the width of her rectangular fence.

Jordan is designing a picture frame for a poster. The perimeter of the frame is $80\mathrm{cm}$. The length is $12\mathrm{cm}$ longer than its width. Identify the dimensions of this poster.