Question 941139
Let the length be l and width be w
From first statement, perimeter = 2(l+w)

2l+2w = 46
w = 2*l - 3

solving the simultaneous eqns
2l+2w = 46
2l-w = 3

*[invoke linear_substitution "l", "w", 2, 2, 46, 2, -1, 3 ]

length = 8.67 ft
width = 14.33 ft