Answer:
[tex]\Large \boxed{x\leq 15}[/tex]
Step-by-step explanation:
Perimeter of a shape is equal to the sum of all sides.
Write an inequality
[tex]8+8+10+10+x\leq 51[/tex]
Solve for x
[tex]36+x\leq 51[/tex]
[tex]x\leq 15[/tex]
The possible values of x are 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
