Question

A garden measuring 8 feet by 12 feet will have a wallkway around it. The walkway has a uniform width, and the area covered by the garden and the walk way is 192 square feet.

Answer 1

2 ft

let x be the width of the walkway,
(2x+8)+(2x+12)=19
(x+4)(x+6)=48
x^2+10x-24=0
(x+12)(x-2)=0
x=2 or x=2
only x > 0