Answer:
x=1
Explanation:
3x+9<15
3(1)+9<15
3+9<15
12<15
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it can't be 2 because this happens
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3x+9<15
3(2)+9<15
6+9<15
15<15
15 isn't less than 15
I HOPE THIS IS RIGHT AND HAVE A GOOD DAY!!!!!!!!!!!!!!!