Question 254325
You are close. But not quite correct
{{{3x+9 < 18}}}
{{{3x < 18=9}}}
{{{3x < 9}}}
{{{x < 9/3}}}
{{{x<3}}}

So x=3 is NOT an answer. All values of x that are "less than three" work.

You're on the right path with the algebra. But don't swap the < into an =.