If f(x) = 4x + 0, find x when f(x) = 20.
Note
When a function value is given, treat it like an equation. Set 4x + 0 = 20. Solving gives x = 5. Move the constant term first, then divide by the coefficient of x. So the required value of x is 5.
If f(x) = 4x + 0, find x when f(x) = 20.
When a function value is given, treat it like an equation. Set 4x + 0 = 20. Solving gives x = 5. Move the constant term first, then divide by the coefficient of x. So the required value of x is 5.