Question

HOW DO YOU MAKE -4.2 A ONE, HOW DO YOU ISOLATE IT OR DO SOMETHING SIMILAR

Answer 1

what do you mean "make -4.2 a one" ? is it something like you express -4.2 as sum of two number where one of them is 1 ?

Answer 2

or you can also make it 1 by dividing it by itself :
9-4.2) / (-4.2) = 1