If f(x) = 2x + -2, find x when f(x) = 4.
Note
When a function value is given, treat it like an equation. Set 2x + -2 = 4. Solving gives x = 3. Move the constant term first, then divide by the coefficient of x. So the required value of x is 3.
If f(x) = 2x + -2, find x when f(x) = 4.
When a function value is given, treat it like an equation. Set 2x + -2 = 4. Solving gives x = 3. Move the constant term first, then divide by the coefficient of x. So the required value of x is 3.