Question

The length of a rectangle is 3 less than twice the width if the perimeter is 30 find the length and width

Answer 1

Let x = width
2x-3= length 

2W + 2L = Perimeter
2(x) + 2(2x-3) = 84
2x+4x-6=84
6x-6=84 
6x-6=84+6
6x=90
x=15 ft Width 
2x-3 = 2*15-3 = 27 ft Length 


Check: 2*15 + 2*27
30 +54 
84 It checks!! 

I hope this helped!