Question 1060429
2(l+w) = 14x + 2

given w = x+2

2(l + x+2) = 14x + 2

l + x + 2 = (14x + 2)/2 = 7x + 1

l = 7x + 1 - x - 2 = 6x - 1

So length is described as 6x - 1