Answer:
8) 55 + 8.5x = 123
subtract 55 from both sides
8.5x = 68
x = 8 days
9) 6.75 + 1.25x = 31.75
subtract 6.75 on both sides
1.25x = 25
x = 20 refills
CaN't SeE ThE LeTtErS...
Explanation:
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