Let the length of the garden be x, then, the width = x - 7
perimeter of rectangle = 2(L + B) = 90 m
= 2(x + x - 7) = 90
= 2x - 7 = 45 ( after dividing through by 2)
= 2x = 45 + 7 = 52
x = $\;{52}/{2}$ = 26 m
Thus, the length of the rectangular garden = 26 m.
