This is the answer to your question. I hope this helps!
Let's see what to do buddy...
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Reminder:

So we need to just Multiply above equations like this :




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And we're done.
Thanks for watching buddy good luck.
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Answer:
Step-by-step explanation:
hmmm
Answer:
I wanna say b
Step-by-step explanation:
I'm gonna say b because u would think since they've paid $13, and it sells for $22, u would add that on the price, which in my opinion would be x + 13 = 22