The length of the rectangle is 8cm longer than the width. l=w+8 If the length of the original rectangle is increased by 6cm and the width is increased by 3cm the perimeter is 76cm. p=76=((l+6)+(w+3))*2=(l+6+w+3)*2=(l+w+9)*2
to solve this substitute l=w+8 into the p= equation: p=76=((w+8)+w+9)*2= 76=(2w+17)*2 76=4w+34 42=4w 10.5=w
