Answer:
Copper, and Zinc
Step-by-step explanation:
This is because Copper and Zinc are the only elements listed on the modern day Periodic Table of Elements.
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b
p = - 5
–2.5p – 20 = 9p + 37.5
combine like terms:
- 2.5p - 9p = 37.5 + 20
simplify:
- 11.5p = 57.5
p = 57.5 / -11.5