EXPLANATION
If f(x) = 4x + 34, the values of x such that f(x) = 0 can be obtained by equaling the function to zero as shown as follows:
4x + 34 = 0
Subtracting -34 to both sides:
4x = -34
Dividing both sides by 4:
x = -34/4
Simplifying:
x = -8.5
Hence, the value is x=-8.5