A rational identity and a scaled input

Show that $\dfrac{2x^2+2x-8}{x^2+x-6}-1=\dfrac{x^2+x-2}{x^2+x-6}$.1 mark

Hence, without using a calculator, solve the inequality $\dfrac{2x^2+2x-8}{x^2+x-6}\leq1$.4 marks

Deduce the solution to the inequality $\dfrac{4x^2+2x-4}{2x^2+x-3}\leq1$.2 marks