Area of garden

If the width of the rectangular garden is decreased by 2 meters and its length is increased by 5 meters, the area of the rectangle will be 0.2 ares larger. If the width and the length of the garden will increase by 3 meters, its original size will increase by 0.9 ares. Find the dimensions of the garden.

Correct answer:

a =  12 m
b =  15 m

Step-by-step explanation:

(a2) (b+5) = ab + 0.2 100 (a+3) (b+3) = ab + 0.9 100  5a2b=30 a+b=27  5 a2 b=30 a+b=27  5a2b=30 a+b=27  Row251 Row1Row2 5a2b=30 1.4b=21  b=1.421=15 a=530+2b=530+2 15=12=12 m  a=12 b=15
b=15=15 m

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