Answer:

Step-by-step explanation:
We start off with 3.2n + 13.3 = 26.1.
We need to get n by itself.
Subtract 13.3 from both sides.


We end up with: 
Divide 3.2 on both sides to get n by itself.

Answer:
X=9
Step-by-step explanation:
6/8=3/4
x/12=3/4
x=9
Answer:
I don't get it but in my opinion I would say it's 4
Answer:
12
Step-by-step explanation:
×12+8
3x + 22 is the equation that represents the perimeter of the triangle. 4x + 10 is the perimeter of the rectangle. Setting the two equal:

and collecting like terms:

We find that the perimeter of both shapes is equal to 11 units.