Respuesta :

Length=x
Width=x+12
Perimeter=68

To find the perimeter you have to add all the sides

So it will look like this:
x+(x+12)+x+(x+12)=68
4x+24=68
4x=68-24
4x=44
x=44/4
x=11

the length is 11 cm long
width is 11+12= 23
The width is 23cm long

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