The value of x is: 
<u><em>Recall</em></u>:
Perimeter of a shape is the sum of all its sides
<em>Thus</em>:
Perimeter of the triangle = 
Perimeter of the rectangle = 
We are told that the perimeter of both shapes are equal. Set both perimeters equal and solve for x.

<em>Add like terms</em>
<em />
<em>Divide both sides by 3</em>
<em />
The value of 
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brainly.com/question/20562416
Answer:
0.75
Step-by-step explanation:
300 out of 400 is the same as 3/4.
3/4 converted to a decimal is 0.75.
Answer:
2/3 i think
Step-by-step explanation:
Answer:
A is a subset of B i believe that's the answer