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Answer:
Step-by-step explanation:
The area of a rectangle can be calculated with the formula:
l: the length of the rectangle.
w: the width of the rectangle.
The area of the remaning wall after the mural has been painted, will be the difference of the area of the wall and the area of the mural.
Knowing that the dimensions of the wall are by
, its area is:
As they are planning that the dimensions of the mural be by
, its area is:
Then the area of the remaining wall after the mural has been painted is: