The perimeter of a rectangle is equal to the sum of all side’s. 2(lengths)+2(widths)= perimeter Length=3x+4 Now given the perimeter of 140 3(3x+4)+3(x)=140 9x+12+3x=140 12x+12=140 12x=128 X= 10.7 10.7 is the width
Length=3x+4 Length =3(10.6)+4 Length=31.8+4 Length=35.8 Answer = 35.8 This can only be answered if you were given a perimeter.
