Find the perimeter of the following rectangle.
To find the perimeter, add the lengths of the four sides:
P 
= 
(3x+2)+(x+4)+(3x+2)+(x+4) 

Set it up! 

= 
(3x+x+3x+x)*(2+4+2+4) 

Regroup 

= 
8x+12 

Combine like terms 
Find the perimeter of the following rectangle by using the formula P=2L+2W, where L represents the legth and W represents the width of the rectangle.
To find the perimeter, let L=2x+3 (the legth) and W=x+1 (the width) and plug these values into the formula P=2L+2W.
P 
= 
2(2x+3)+2(x+1) 

Substitute for L and W 

= 
4x+6+2x+2 

Use the distributive property 

= 
(4x+2x)+(6+2) 

Regroup 

= 
6x+8 

Combine like terms 