i can’t graph it, but this is how you would simplify it:
|3x-6|+3<15
(subtracting is really adding a negative):
|3x+-6|+3<15
(absolute value makes it all positive):
3x+6+3<15
3x+9<15 should be the answer, but if it were to act as a ratio this would be the answer:
x+3<5
