15 is the answer because 8-5 is 3 and 3 and 4 is 12 so 12 plus 3 is 15
Can you translate so I can help you out
The first operation performed while evaluating would be to do the parenthesis
Answer:
Area of room = 21 * 16
= 336 m²
Area of Carpet = (21 - 1)* (16-1)
= 20*15
= 300
Area of border = Area of room - Area of carpet
= 336 - 300
<h3>= 36 m².</h3>