What is the value of x so the rectangles have the same area.
a. 12 & x
b. x-2 & 16

The area of a rectangle is L x W. We have to get the value of x first so that we can find the area of the rectangle.

To get the value of x
given:
a. 12 & X
b. X-2 & 16
solution:
12x (x) = (8-2 ) 16
12x = 16x-32
32 = 16x-- 12x
32 = 4x
4        4
8 = x

Checking:

a. 12 & X                                                          b. X-2 & 16
Area of a rectangle = L x W                            Area of a rectangle  = L x W
                                =12 x 8                                                             =  (8-2) 16
Area of a rectangle = 96                                                                  = 6 (16)
                                                                        Area of a rectangle  = 96