One way is to move the 4 to other side so it would be x = 13 - 4 and that's x = 9
Look at the picture.

For XY and ZX use the Pythagorean theorem.


The perimetero fo XYZ:

Step 1: Since this figure has 4 sides, the total degree will be 360 degrees.
Step 2: Create Equation: 41+86+133+x= 360
Step 3: Solve it: you will get the final answer of x=100
Answer:
0,0
2,-1
-2,4
Step-by-step explanation:
Move all terms to the left side and set equal to zero. Then set each factor equal to zero.
x=10,−1