Subtract four from both sides. That'll put both numbers without a variable on one side, and the number with the variable is by itself.
Answer:
English please
Step-by-step explanation:
Answer:

<em><u>I </u></em><em><u>hope </u></em><em><u>it </u></em><em><u>helps</u></em>
<em><u>have </u></em><em><u>a </u></em><em><u>great </u></em><em><u>day </u></em>
<em><u>
</u></em>
I hope this helps you
a^6n-3n
a^3n