3х + 4y = 15
X - Зy = -8

(x,y)=(1,3)

Step-by-step explanation:

3x+4y=15_(i)

x_3y=_8_(ii)

subtracting both equations equation (ii) multiplying by 3

3x+4y=15

3x_9y=_24

13y=39

y=39/3

y=3

putting the value of y in equation (i)

3x+4y=15

3x+4×3=15

3x+12=15

3x=15_12

3x=3

x=3/3

x=1

(x,y)=(1,3)

maximum area = xy = (16)(32) = 512 ft2

to maximize the area of the garden, the side of the fence parallel to the side of the house should be 32 ft long, and the other two sides should both have length 16 ft.'

source