Answer: 12?
Step-by-step explanation:
Hey there!
We can solve this problem by doing PEMDAS, which lists:

We have in this equation

Let's sp;ve this equation now!
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Exponents ↓

Division ↓

Okay now , I show you the steps so it can be easier to solve!

Good luck on your assignment and enjoy your day!
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12x+12 step by step below
Answer:
3,7,11,15
Step-by-step explanation:
1) 3
2) 3+4=7
3) 7+4=11
4) 11+4=15