For function(x)=5x+1answers are-19, 1, -21 ,21

Will there be some kind of question ?

If not, the only value that does not fit with integer x is -21

To determine the values of x that correspond to a given output for a function, we can use inverse operations. Let's solve the equation for each of the given outputs one by one:

1. For an output of -19:
5x + 1 = -19
Subtract 1 from both sides:
5x = -20
Divide both sides by 5:
x = -20/5
x = -4

2. For an output of 1:
5x + 1 = 1
Subtract 1 from both sides:
5x = 0
Divide both sides by 5:
x = 0/5
x = 0

3. For an output of -21:
5x + 1 = -21
Subtract 1 from both sides:
5x = -22
Divide both sides by 5:
x = -22/5

4. For an output of 21:
5x + 1 = 21
Subtract 1 from both sides:
5x = 20
Divide both sides by 5:
x = 20/5
x = 4

Therefore, the values of x that correspond to the given outputs are:
x = -4, x = 0, x = -22/5, x = 4