Answer:
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Step-by-step explanation:

Combine all like terms.


Multiply both sides by -1.

Answer:
yes, he can but the backpack.
Step-by-step explanation:
The first or third graph represents the situation
After 25 days he would expect to have , i would say 88 packs left
I cant make out the bottom figure below third graph
17. All
18. B because it can be symmetrical either way