f(x) = 3x + 2
We want to find the value of x that makes f(x) be -4 . That is...
We want to find the value of x that makes 3x + 2 be -4 .
We want to find the value of x that makes this equation true:
3x + 2 = -4 Now let's solve this equation for x . Subtract 2 from both sides.
3x = -4 - 2
3x = -6 Divide both sides by 3 .
x = -2