Answer:
[tex]x = 5[/tex]
Step-by-step explanation:
The diagonals of a parallelogram bisect each other.
This means that:
[tex]15 - x = 2x[/tex]
Add x to both sides:
[tex]15 = 2x + x[/tex]
[tex]15 = 3x[/tex]
Divide both be sides by 3
[tex]5 = x[/tex]
Therefore the value of x is
[tex]5[/tex]
