Hey there!
Firstly, we are going add
on each of the sides that we're working with. like ↓
This gives us
(if you are wondering how we got the out come of 
it is because I added 
Now multiply
on each of your sides
Cancel the first set and you will find the value of
Good luck on your assignment and enjoy your day
~
Firstly, we are going add
This gives us
Now multiply
Cancel the first set and you will find the value of
Good luck on your assignment and enjoy your day
~