Question 332710
let width be x cm
length = x/2 +9
..
Perimeter = 2(L+W)
=2(x+(x/2)+9)
=2(3x/2 +9)
=2(3x+18)/2
=3x+18
..
3x+18=60
add -18
3x+18-18=60-18
3x=42
divide by 3
x= 14 the width
..
length = x/2 +9
14/2  +9
=7+9
=16cm length
..
CHECK
2*(14+16)=60