Question

in figure DE||BC if AD=X, DB=x-2, AE=X + 2,EC=x-1, find x.

Answer 1

AD/DB=AE/EC
x/x-2=x+2/x-1
x(x-1)=(x+2)(x-2)
x^2-x=x^2-4
-x=-4
x=4