**Answer:**

x=0, y=-5. (0, -5).

**Step-by-step explanation:**

5x-6y=30

-6y=30

-----------

y=30/-6=-5

5x-6(-5)=30

5x+30=30

5x=30-30

5x=0

x=0/5

x=0

We would be solving you equation step by step.

<span><span>96<span>(<span>70n</span>)</span></span>=<span><span><span>(96)</span><span>(70)</span></span><span>(28)

</span></span></span>Step 1: Simplify both sides of the equation.

<span><span>6,720n</span>=188,160

</span>Step 2: Divide both sides by 6720.

<span><span><span>6720n/</span>6720</span>=<span>188160/6720</span></span><span>n=28

</span><u>**Answer:**</u><span>**n=**<span>**28**</span></span>

**Answer:**

17.5

**Step-by-step explanation:**

delta

Play ground 70% (TOTAL)

books 30% (TOTAL)

60% of the 70% are boys

20% of the 30% are boys

Does that sound about right for a start?