# math

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the dimensions of a door are 3ft by 7ft 6in. if the same amount is added to each dimension of the door, the area is increased by 18ft^2. Find the dimensions of the new door.

• math -

(3+x)(7.5+x) = 3*7.5+18
x = 3/2

new dimensions: 4'6" by 9'0"

check:
3*7.5 = 22.5
4.5*9 = 40.5

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