Answer:
9
Step-by-step explanation:
We can set up a systems of equations to find the value of the third side.
Let's assume that 
is the length of both sides 1 and 2. Let's also assume that 
is the length of the third side.
We know that 
, and looking at the first clue we can make the equation 
.
We can substitute y into the equation .
So the length of the side that is the same as the second is 7.
Now we can plug this into the equation to find .
Hope this helped!
Y= -2x+3
-2 is the slope which is given, and 3 is the y intercept which is also given, so plug those numbers in y=Mx+b to make your equation
Answer:
I think its -20/33- Im not that confident but i worked it out :)
I'm not sure what operation you're using but for example, subtraction and addition are inverse operations and division and multiplication are inverse operations
