In order to move a the constant terms to the right hand side, we need to subtract 0.4 from both sides of the equation.
In an equation, the constant terms are those terms that do not have any alphabet attached to them. In this case, 4 and 0.4 are constant terms.
In order to move a the constant terms to the right hand side, we need to subtract 0.4 from both sides of the equation thus;
-9x + 0.4 - 0.4 = 4 - 0.4
-9x = 3.6
Learn more about constant terms:https://brainly.com/question/14368568
#SPJ1