Answer:
<h2>
<em>y</em><em>=</em><em>-</em><em>4</em></h2>
<em>Sol</em><em>ution</em><em>,</em>
<em>X=</em><em>4</em>
<em>Now</em><em>,</em>
<em>
</em>
<em>Hope</em><em> </em><em>this</em><em> </em><em>helps</em><em>.</em><em>.</em><em>.</em>
<em>Good</em><em> </em><em>luck</em><em> on</em><em> your</em><em> assignment</em><em>.</em><em>.</em>
Just isolate f.. buy getting it alone on one side or the other
Answer:

Step-by-step explanation:
I don't know if this was the answer you were looking for but there you go, there are many other possibilities you could also use.