Write an equation to represent the relationship "a number decreased by negative 2 is equal to 21."then solve the equqtion

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =