Question 53777
let w=width
and since length is 5 less than twice the width,
length=2 times the width minus 5   or
length=2w-5
Perimeter=2*length+2*width:
Perimeter=2(2w-5)+2w=230
distribute:4w-10+2w=230
combine like terms:6w-10=230
add 10 to both sides:  6w=240 
divide by 6:            w=40
so length= 2(40) - 5 = 80 - 5 = 75 

check:  2*(40) + 2*(75) = 80 +150 =230