Question 983408
let width of page be x
length of page = (x+3)

width of painted area = (x-2) cm
length of printed area = (x+3)-3 = x

x(x-2) =  printed area 

x^2-2x = 80
x^2=10x+8x=80

x^2-10x+8x-80=0

x(x-10)+8(x-10)=0

(x+8)(x-10)=0

x= -8 OR 10 ( ignore negative)

width of page = 10cm
length of page = 13 cm