Find expert answers and community support for all your questions on IDNLearn.com. Find in-depth and trustworthy answers to all your questions from our experienced community members.
Answer:
x=40
Step-by-step explanation:
Looking at this problem, we can see that 3x+9=129
Subtract 9 on both sides:
3x=120
Divide by 3 on both sides:
x=40