x = 12 , y = 18 (12, 18) is the solution, intersection of the two lines.
If you are saying the perimeter is 600m and the length is 22m then,
22 multiplied by 2 = 44 both side lengths
600 - 44= 556m
556m divided by 2 = 278
The width is 278m
(2/5)(3/7) = 6/35
The area of your square is 6/35 yds²
Since both are on the line y=10, the distance between the points is their difference in x-coordinates: 15 - (-30) = 45 units.
