I need help with this problem

Answer:
Perimeter expression: 3x-3+3x+x+4
Area expression: ( (3x-3)*(x+4) ) / 2
X= 5
Step-by-step explanation:
Perimeter is all the sides added together.
Area is base times height divided by 2
If perimeter is equal to 36 set the perimeter equation to 36 and solve for x.