For this case we must solve the following inequality:
[tex]3x <18[/tex]
Dividing between 3 on both sides of the inequality we have:
[tex]x <\frac {18} {3}\\x <6[/tex]
Thus, the solution of the variable "x" is given by all the numbers smaller than 6.
Answer:
All values of "x" less than 6.
(-∞, 6)
