Michael is 4 times as old as brandon and is also 27 years older than brandon. how old is brandon

Let's represent Brandon's age by x and Michael is 4 times as old as Brandon so 4x andx+ 27. The equation is
4x=x+27                                            Therefore Brandon is 9 years old.
4x-x=x-x+27                                           4x=4*9=36
3x=27                                                       x+27=9+27=36
3x/3=27/3   
x=9

Answers2x^2-5=722x^2-5x=725x^2-2x=725x^2-2=72 what is the answer